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Differential D96850

[clang] Add -ffinite-loops & -fno-finite-loops options.
AbandonedPublic

Authored by fhahn on Feb 17 2021, 1:52 AM.

Details

Reviewers
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Summary

This cherry-picks the following patches on the release branch:

6280bb4cd80e [clang] Remove redundant condition (NFC).
51bf4c0e6d4c [clang] Add -ffinite-loops & -fno-finite-loops options.
fb4d8fe80701 [clang] Update mustprogress tests

This patch adds 2 new options to control when Clang adds mustprogress:

  1. -ffinite-loops: assume all loops are finite; mustprogress is added to all loops, regardless of the selected language standard.
  2. -fno-finite-loops: assume no loop is finite; mustprogress is not added to any loop or function. We could add mustprogress to functions without loops, but we would have to detect that in Clang, which is probably not worth it.

Diff Detail

Event Timeline

fhahn created this revision.Feb 17 2021, 1:52 AM
Herald added subscribers: jansvoboda11, dexonsmith, dang. · View Herald TranscriptFeb 17 2021, 1:52 AM
fhahn requested review of this revision.Feb 17 2021, 1:52 AM
Herald added a project: Restricted Project. · View Herald TranscriptFeb 17 2021, 1:52 AM
Herald added a subscriber: cfe-commits. · View Herald Transcript
Harbormaster completed remote builds in B89515: Diff 324235.Feb 17 2021, 2:53 AM
fhahn abandoned this revision.Mar 10 2021, 11:57 AM

those have been picked onto 12.x

Revision Contents

PathSize
clang/
include/
clang/
Basic/
6 lines
3 lines
Driver/
5 lines
lib/
CodeGen/
11 lines
Driver/
ToolChains/
3 lines
Frontend/
5 lines
test/
CodeGen/
221 lines
CodeGenCXX/
330 lines

Diff 324235

clang/include/clang/Basic/CodeGenOptions.h

Show First 20 Lines • Show All 134 Lines • ▼ Show 20 Linespublic:
std::string BinutilsVersion; std::string BinutilsVersion;
enum class FramePointerKind { enum class FramePointerKind {
None, // Omit all frame pointers. None, // Omit all frame pointers.
NonLeaf, // Keep non-leaf frame pointers. NonLeaf, // Keep non-leaf frame pointers.
All, // Keep all frame pointers. All, // Keep all frame pointers.
}; };
enum FiniteLoopsKind {
Language, // Not specified, use language standard.
Always, // All loops are assumed to be finite.
Never, // No loop is assumed to be finite.
};
/// The code model to use (-mcmodel). /// The code model to use (-mcmodel).
std::string CodeModel; std::string CodeModel;
/// The filename with path we use for coverage data files. The runtime /// The filename with path we use for coverage data files. The runtime
/// allows further manipulation with the GCOV_PREFIX and GCOV_PREFIX_STRIP /// allows further manipulation with the GCOV_PREFIX and GCOV_PREFIX_STRIP
/// environment variables. /// environment variables.
std::string CoverageDataFile; std::string CoverageDataFile;
▲ Show 20 Lines • Show All 283 Lines • Show Last 20 Lines

clang/include/clang/Basic/CodeGenOptions.def

Show First 20 Lines • Show All 260 Lines • ▼ Show 20 Lines
CODEGENOPT(UnrollLoops , 1, 0) ///< Control whether loops are unrolled. CODEGENOPT(UnrollLoops , 1, 0) ///< Control whether loops are unrolled.
CODEGENOPT(RerollLoops , 1, 0) ///< Control whether loops are rerolled. CODEGENOPT(RerollLoops , 1, 0) ///< Control whether loops are rerolled.
CODEGENOPT(NoUseJumpTables , 1, 0) ///< Set when -fno-jump-tables is enabled. CODEGENOPT(NoUseJumpTables , 1, 0) ///< Set when -fno-jump-tables is enabled.
CODEGENOPT(UnwindTables , 1, 0) ///< Emit unwind tables. CODEGENOPT(UnwindTables , 1, 0) ///< Emit unwind tables.
CODEGENOPT(VectorizeLoop , 1, 0) ///< Run loop vectorizer. CODEGENOPT(VectorizeLoop , 1, 0) ///< Run loop vectorizer.
CODEGENOPT(VectorizeSLP , 1, 0) ///< Run SLP vectorizer. CODEGENOPT(VectorizeSLP , 1, 0) ///< Run SLP vectorizer.
CODEGENOPT(ProfileSampleAccurate, 1, 0) ///< Sample profile is accurate. CODEGENOPT(ProfileSampleAccurate, 1, 0) ///< Sample profile is accurate.
/// Treat loops as finite: language, always, never.
ENUM_CODEGENOPT(FiniteLoops, FiniteLoopsKind, 2, FiniteLoopsKind::Language)
/// Attempt to use register sized accesses to bit-fields in structures, when /// Attempt to use register sized accesses to bit-fields in structures, when
/// possible. /// possible.
CODEGENOPT(UseRegisterSizedBitfieldAccess , 1, 0) CODEGENOPT(UseRegisterSizedBitfieldAccess , 1, 0)
CODEGENOPT(VerifyModule , 1, 1) ///< Control whether the module should be run CODEGENOPT(VerifyModule , 1, 1) ///< Control whether the module should be run
///< through the LLVM Verifier. ///< through the LLVM Verifier.
CODEGENOPT(StackRealignment , 1, 0) ///< Control whether to force stack CODEGENOPT(StackRealignment , 1, 0) ///< Control whether to force stack
▲ Show 20 Lines • Show All 143 Lines • Show Last 20 Lines

clang/include/clang/Driver/Options.td

  • This file is larger than 256 KB, so syntax highlighting is disabled by default.
Show First 20 Lines • Show All 2,404 Lines • ▼ Show 20 Lines
def funit_at_a_time : Flag<["-"], "funit-at-a-time">, Group<f_Group>; def funit_at_a_time : Flag<["-"], "funit-at-a-time">, Group<f_Group>;
def funroll_loops : Flag<["-"], "funroll-loops">, Group<f_Group>, def funroll_loops : Flag<["-"], "funroll-loops">, Group<f_Group>,
HelpText<"Turn on loop unroller">, Flags<[CC1Option]>; HelpText<"Turn on loop unroller">, Flags<[CC1Option]>;
def fno_unroll_loops : Flag<["-"], "fno-unroll-loops">, Group<f_Group>, def fno_unroll_loops : Flag<["-"], "fno-unroll-loops">, Group<f_Group>,
HelpText<"Turn off loop unroller">, Flags<[CC1Option]>; HelpText<"Turn off loop unroller">, Flags<[CC1Option]>;
defm reroll_loops : BoolFOption<"reroll-loops", defm reroll_loops : BoolFOption<"reroll-loops",
CodeGenOpts<"RerollLoops">, DefaultFalse, CodeGenOpts<"RerollLoops">, DefaultFalse,
PosFlag<SetTrue, [CC1Option], "Turn on loop reroller">, NegFlag<SetFalse>>; PosFlag<SetTrue, [CC1Option], "Turn on loop reroller">, NegFlag<SetFalse>>;
def ffinite_loops: Flag<["-"], "ffinite-loops">, Group<f_Group>,
HelpText<"Assume all loops are finite.">, Flags<[CC1Option]>;
def fno_finite_loops: Flag<["-"], "fno-finite-loops">, Group<f_Group>,
HelpText<"Do not assume that any loop is finite.">, Flags<[CC1Option]>;
def ftrigraphs : Flag<["-"], "ftrigraphs">, Group<f_Group>, def ftrigraphs : Flag<["-"], "ftrigraphs">, Group<f_Group>,
HelpText<"Process trigraph sequences">, Flags<[CC1Option]>; HelpText<"Process trigraph sequences">, Flags<[CC1Option]>;
def fno_trigraphs : Flag<["-"], "fno-trigraphs">, Group<f_Group>, def fno_trigraphs : Flag<["-"], "fno-trigraphs">, Group<f_Group>,
HelpText<"Do not process trigraph sequences">, Flags<[CC1Option]>; HelpText<"Do not process trigraph sequences">, Flags<[CC1Option]>;
def funsigned_bitfields : Flag<["-"], "funsigned-bitfields">, Group<f_Group>; def funsigned_bitfields : Flag<["-"], "funsigned-bitfields">, Group<f_Group>;
def funsigned_char : Flag<["-"], "funsigned-char">, Group<f_Group>; def funsigned_char : Flag<["-"], "funsigned-char">, Group<f_Group>;
def fno_unsigned_char : Flag<["-"], "fno-unsigned-char">; def fno_unsigned_char : Flag<["-"], "fno-unsigned-char">;
def funwind_tables : Flag<["-"], "funwind-tables">, Group<f_Group>; def funwind_tables : Flag<["-"], "funwind-tables">, Group<f_Group>;
▲ Show 20 Lines • Show All 3,424 Lines • Show Last 20 Lines

clang/lib/CodeGen/CodeGenFunction.h

Show First 20 Lines • Show All 501 Lines • ▼ Show 20 Linespublic:
/// True if the current statement has nomerge attribute. /// True if the current statement has nomerge attribute.
bool InNoMergeAttributedStmt = false; bool InNoMergeAttributedStmt = false;
/// True if the current function should be marked mustprogress. /// True if the current function should be marked mustprogress.
bool FnIsMustProgress = false; bool FnIsMustProgress = false;
/// True if the C++ Standard Requires Progress. /// True if the C++ Standard Requires Progress.
bool CPlusPlusWithProgress() { bool CPlusPlusWithProgress() {
if (CGM.getCodeGenOpts().getFiniteLoops() ==
CodeGenOptions::FiniteLoopsKind::Never)
return false;
return getLangOpts().CPlusPlus11 || getLangOpts().CPlusPlus14 || return getLangOpts().CPlusPlus11 || getLangOpts().CPlusPlus14 ||
getLangOpts().CPlusPlus17 || getLangOpts().CPlusPlus20; getLangOpts().CPlusPlus17 || getLangOpts().CPlusPlus20;
} }
/// True if the C Standard Requires Progress. /// True if the C Standard Requires Progress.
bool CWithProgress() { bool CWithProgress() {
if (CGM.getCodeGenOpts().getFiniteLoops() ==
CodeGenOptions::FiniteLoopsKind::Always)
return true;
if (CGM.getCodeGenOpts().getFiniteLoops() ==
CodeGenOptions::FiniteLoopsKind::Never)
return false;
return getLangOpts().C11 || getLangOpts().C17 || getLangOpts().C2x; return getLangOpts().C11 || getLangOpts().C17 || getLangOpts().C2x;
} }
/// True if the language standard requires progress in functions or /// True if the language standard requires progress in functions or
/// in infinite loops with non-constant conditionals. /// in infinite loops with non-constant conditionals.
bool LanguageRequiresProgress() { bool LanguageRequiresProgress() {
return CWithProgress() || CPlusPlusWithProgress(); return CWithProgress() || CPlusPlusWithProgress();
} }
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clang/lib/Driver/ToolChains/Clang.cpp

  • This file is larger than 256 KB, so syntax highlighting is disabled by default.
Show First 20 Lines • Show All 5,614 Lines • ▼ Show 20 Lines if (A->getOption().matches(options::OPT_fno_strict_overflow))
CmdArgs.push_back("-fwrapv"); CmdArgs.push_back("-fwrapv");
} }
if (Arg *A = Args.getLastArg(options::OPT_freroll_loops, if (Arg *A = Args.getLastArg(options::OPT_freroll_loops,
options::OPT_fno_reroll_loops)) options::OPT_fno_reroll_loops))
if (A->getOption().matches(options::OPT_freroll_loops)) if (A->getOption().matches(options::OPT_freroll_loops))
CmdArgs.push_back("-freroll-loops"); CmdArgs.push_back("-freroll-loops");
Args.AddLastArg(CmdArgs, options::OPT_ffinite_loops,
options::OPT_fno_finite_loops);
Args.AddLastArg(CmdArgs, options::OPT_fwritable_strings); Args.AddLastArg(CmdArgs, options::OPT_fwritable_strings);
Args.AddLastArg(CmdArgs, options::OPT_funroll_loops, Args.AddLastArg(CmdArgs, options::OPT_funroll_loops,
options::OPT_fno_unroll_loops); options::OPT_fno_unroll_loops);
Args.AddLastArg(CmdArgs, options::OPT_pthread); Args.AddLastArg(CmdArgs, options::OPT_pthread);
if (Args.hasFlag(options::OPT_mspeculative_load_hardening, if (Args.hasFlag(options::OPT_mspeculative_load_hardening,
options::OPT_mno_speculative_load_hardening, false)) options::OPT_mno_speculative_load_hardening, false))
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clang/lib/Frontend/CompilerInvocation.cpp

Show First 20 Lines • Show All 1,031 Lines • ▼ Show 20 Lines#undef CODEGEN_OPTION_WITH_MARSHALLING
Opts.OptimizeSize = getOptimizationLevelSize(Args); Opts.OptimizeSize = getOptimizationLevelSize(Args);
Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) || Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
Args.hasArg(OPT_ffreestanding)); Args.hasArg(OPT_ffreestanding));
if (Opts.SimplifyLibCalls) if (Opts.SimplifyLibCalls)
getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs); getAllNoBuiltinFuncValues(Args, Opts.NoBuiltinFuncs);
Opts.UnrollLoops = Opts.UnrollLoops =
Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops, Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
(Opts.OptimizationLevel > 1)); (Opts.OptimizationLevel > 1));
Opts.BinutilsVersion = Opts.BinutilsVersion =
std::string(Args.getLastArgValue(OPT_fbinutils_version_EQ)); std::string(Args.getLastArgValue(OPT_fbinutils_version_EQ));
Opts.DebugNameTable = static_cast<unsigned>( Opts.DebugNameTable = static_cast<unsigned>(
Args.hasArg(OPT_ggnu_pubnames) Args.hasArg(OPT_ggnu_pubnames)
? llvm::DICompileUnit::DebugNameTableKind::GNU ? llvm::DICompileUnit::DebugNameTableKind::GNU
: Args.hasArg(OPT_gpubnames) : Args.hasArg(OPT_gpubnames)
? llvm::DICompileUnit::DebugNameTableKind::Default ? llvm::DICompileUnit::DebugNameTableKind::Default
▲ Show 20 Lines • Show All 270 Lines • ▼ Show 20 Lines parseSanitizerKinds("-fsanitize-recover=",
Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags, Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
Opts.SanitizeRecover); Opts.SanitizeRecover);
parseSanitizerKinds("-fsanitize-trap=", parseSanitizerKinds("-fsanitize-trap=",
Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags, Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
Opts.SanitizeTrap); Opts.SanitizeTrap);
Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true); Opts.EmitVersionIdentMetadata = Args.hasFlag(OPT_Qy, OPT_Qn, true);
if (Args.hasArg(options::OPT_ffinite_loops))
Opts.FiniteLoops = CodeGenOptions::FiniteLoopsKind::Always;
else if (Args.hasArg(options::OPT_fno_finite_loops))
Opts.FiniteLoops = CodeGenOptions::FiniteLoopsKind::Never;
return Success; return Success;
} }
static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts, static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
ArgList &Args) { ArgList &Args) {
if (Args.hasArg(OPT_show_includes)) { if (Args.hasArg(OPT_show_includes)) {
// Writing both /showIncludes and preprocessor output to stdout // Writing both /showIncludes and preprocessor output to stdout
// would produce interleaved output, so use stderr for /showIncludes. // would produce interleaved output, so use stderr for /showIncludes.
▲ Show 20 Lines • Show All 1,832 Lines • Show Last 20 Lines

clang/test/CodeGen/attr-mustprogress-0.c

  • This file was deleted.
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-attributes
// RUN: %clang_cc1 -std=c89 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -std=c99 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
int a = 0;
int b = 0;
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @f1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f1() {
for (; 1;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @f2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f2() {
for (; a == b;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @F(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: br label [[FOR_COND1:%.*]]
// CHECK: for.cond1:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY2:%.*]], label [[FOR_END3:%.*]]
// CHECK: for.body2:
// CHECK-NEXT: br label [[FOR_COND1]]
// CHECK: for.end3:
// CHECK-NEXT: ret void
//
void F() {
for (; 1;) {
}
for (; a == b;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @w1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_BODY:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_BODY]]
//
void w1() {
while (1) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @w2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_COND]]
// CHECK: while.end:
// CHECK-NEXT: ret void
//
void w2() {
while (a == b) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @W(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_COND]]
// CHECK: while.end:
// CHECK-NEXT: br label [[WHILE_BODY2:%.*]]
// CHECK: while.body2:
// CHECK-NEXT: br label [[WHILE_BODY2]]
//
void W() {
while (a == b) {
}
while (1) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @d1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: br i1 true, label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d1() {
do {
} while (1);
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @d2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d2() {
do {
} while (a == b);
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @D(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: br i1 true, label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: br label [[DO_BODY1:%.*]]
// CHECK: do.body1:
// CHECK-NEXT: br label [[DO_COND2:%.*]]
// CHECK: do.cond2:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY1]], label [[DO_END3:%.*]]
// CHECK: do.end3:
// CHECK-NEXT: ret void
//
void D() {
do {
} while (1);
do {
} while (a == b);
}

clang/test/CodeGen/attr-mustprogress-0.cpp

  • This file was deleted.
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-attributes
// RUN: %clang_cc1 -std=c++98 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
int a = 0;
int b = 0;
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2f1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f1() {
for (; 1;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2f2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f2() {
for (; a == b;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z1Fv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: br label [[FOR_COND1:%.*]]
// CHECK: for.cond1:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY2:%.*]], label [[FOR_END3:%.*]]
// CHECK: for.body2:
// CHECK-NEXT: br label [[FOR_COND1]]
// CHECK: for.end3:
// CHECK-NEXT: ret void
//
void F() {
for (; 1;) {
}
for (; a == b;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2w1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_BODY:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_BODY]]
//
void w1() {
while (1) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2w2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_COND]]
// CHECK: while.end:
// CHECK-NEXT: ret void
//
void w2() {
while (a == b) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z1Wv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_COND]]
// CHECK: while.end:
// CHECK-NEXT: br label [[WHILE_BODY2:%.*]]
// CHECK: while.body2:
// CHECK-NEXT: br label [[WHILE_BODY2]]
//
void W() {
while (a == b) {
}
while (1) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2d1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: br i1 true, label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d1() {
do {
} while (1);
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2d2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d2() {
do {
} while (a == b);
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z1Dv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: br i1 true, label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: br label [[DO_BODY1:%.*]]
// CHECK: do.body1:
// CHECK-NEXT: br label [[DO_COND2:%.*]]
// CHECK: do.cond2:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY1]], label [[DO_END3:%.*]]
// CHECK: do.end3:
// CHECK-NEXT: ret void
//
void D() {
do {
} while (1);
do {
} while (a == b);
}

clang/test/CodeGen/attr-mustprogress-1.c

  • This file was deleted.
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-attributes
// RUN: %clang_cc1 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -std=c11 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -std=c18 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -std=c2x -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
int a = 0;
int b = 0;
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @f0(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NOT: br label [[FOR_COND]], !llvm.loop !{{.*}}
//
void f0() {
for (; ;) ;
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @f1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f1() {
for (; 1;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @f2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]], [[LOOP2:!llvm.loop !.*]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f2() {
for (; a == b;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @F(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: br label [[FOR_COND1:%.*]]
// CHECK: for.cond1:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY2:%.*]], label [[FOR_END3:%.*]]
// CHECK: for.body2:
// CHECK-NEXT: br label [[FOR_COND1]], [[LOOP4:!llvm.loop !.*]]
// CHECK: for.end3:
// CHECK-NEXT: ret void
//
void F() {
for (; 1;) {
}
for (; a == b;) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @w1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_BODY:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_BODY]]
//
void w1() {
while (1) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @w2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_COND]], [[LOOP5:!llvm.loop !.*]]
// CHECK: while.end:
// CHECK-NEXT: ret void
//
void w2() {
while (a == b) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @W(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_COND]], [[LOOP6:!llvm.loop !.*]]
// CHECK: while.end:
// CHECK-NEXT: br label [[WHILE_BODY2:%.*]]
// CHECK: while.body2:
// CHECK-NEXT: br label [[WHILE_BODY2]]
//
void W() {
while (a == b) {
}
while (1) {
}
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @d1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: br i1 true, label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d1() {
do {
} while (1);
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @d2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]], [[LOOP7:!llvm.loop !.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d2() {
do {
} while (a == b);
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @D(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: br i1 true, label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: br label [[DO_BODY1:%.*]]
// CHECK: do.body1:
// CHECK-NEXT: br label [[DO_COND2:%.*]]
// CHECK: do.cond2:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY1]], label [[DO_END3:%.*]], [[LOOP8:!llvm.loop !.*]]
// CHECK: do.end3:
// CHECK-NEXT: ret void
//
void D() {
do {
} while (1);
do {
} while (a == b);
}

clang/test/CodeGen/attr-mustprogress-1.cpp

  • This file was deleted.
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --check-attributes
// RUN: %clang_cc1 -std=c++11 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -std=c++14 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -std=c++17 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
// RUN: %clang_cc1 -std=c++20 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck %s
int a = 0;
int b = 0;
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2f0v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NOT: br label [[FOR_COND]], !llvm.loop !{{.*}}
void f0() {
for (; ;) ;
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2f1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f1() {
for (; 1;)
;
}
// CHECK: Function Attrs: noinline nounwind optnone mustprogress
// CHECK-LABEL: @_Z2f2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]], [[LOOP2:!llvm.loop !.*]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f2() {
for (; a == b;)
;
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z1Fv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]]
// CHECK: for.end:
// CHECK-NEXT: br label [[FOR_COND1:%.*]]
// CHECK: for.cond1:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY2:%.*]], label [[FOR_END3:%.*]]
// CHECK: for.body2:
// CHECK-NEXT: br label [[FOR_COND1]], [[LOOP4:!llvm.loop !.*]]
// CHECK: for.end3:
// CHECK-NEXT: ret void
//
void F() {
for (; 1;)
;
for (; a == b;)
;
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2F2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[FOR_COND:%.*]]
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_END:%.*]]
// CHECK: for.body:
// CHECK-NEXT: br label [[FOR_COND]], [[LOOP5:!llvm.loop !.*]]
// CHECK: for.end:
// CHECK-NEXT: br label [[FOR_COND1:%.*]]
// CHECK: for.cond1:
// CHECK-NEXT: br i1 true, label [[FOR_BODY2:%.*]], label [[FOR_END3:%.*]]
// CHECK: for.body2:
// CHECK-NEXT: br label [[FOR_COND1]]
// CHECK: for.end3:
// CHECK-NEXT: ret void
//
void F2() {
for (; a == b;)
;
for (; 1;)
;
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2w1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_BODY:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_BODY]]
//
void w1() {
while (1)
;
}
// CHECK: Function Attrs: noinline nounwind optnone mustprogress
// CHECK-LABEL: @_Z2w2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_COND]], [[LOOP6:!llvm.loop !.*]]
// CHECK: while.end:
// CHECK-NEXT: ret void
//
void w2() {
while (a == b)
;
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z1Wv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_COND]], [[LOOP7:!llvm.loop !.*]]
// CHECK: while.end:
// CHECK-NEXT: br label [[WHILE_BODY2:%.*]]
// CHECK: while.body2:
// CHECK-NEXT: br label [[WHILE_BODY2]]
//
void W() {
while (a == b)
;
while (1)
;
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2W2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_BODY:%.*]]
// CHECK: while.body:
// CHECK-NEXT: br label [[WHILE_BODY]]
//
void W2() {
while (1)
;
while (a == b)
;
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2d1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: br i1 true, label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d1() {
do
;
while (1);
}
// CHECK: Function Attrs: noinline nounwind optnone mustprogress
// CHECK-LABEL: @_Z2d2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]], [[LOOP8:!llvm.loop !.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d2() {
do
;
while (a == b);
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z1Dv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: br i1 true, label [[DO_BODY]], label [[DO_END:%.*]]
// CHECK: do.end:
// CHECK-NEXT: br label [[DO_BODY1:%.*]]
// CHECK: do.body1:
// CHECK-NEXT: br label [[DO_COND2:%.*]]
// CHECK: do.cond2:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY1]], label [[DO_END3:%.*]], [[LOOP9:!llvm.loop !.*]]
// CHECK: do.end3:
// CHECK-NEXT: ret void
//
void D() {
do
;
while (1);
do
;
while (a == b);
}
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: @_Z2D2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[DO_BODY:%.*]]
// CHECK: do.body:
// CHECK-NEXT: br label [[DO_COND:%.*]]
// CHECK: do.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]], [[LOOP10:!llvm.loop !.*]]
// CHECK: do.end:
// CHECK-NEXT: br label [[DO_BODY1:%.*]]
// CHECK: do.body1:
// CHECK-NEXT: br label [[DO_COND2:%.*]]
// CHECK: do.cond2:
// CHECK-NEXT: br i1 true, label [[DO_BODY1]], label [[DO_END3:%.*]]
// CHECK: do.end3:
// CHECK-NEXT: ret void
//
void D2() {
do
;
while (a == b);
do
;
while (1);
}

clang/test/CodeGen/attr-mustprogress.c

  • This file was added.
// RUN: %clang_cc1 -std=c99 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C99 %s
// RUN: %clang_cc1 -std=c11 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C11 %s
// RUN: %clang_cc1 -std=c18 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C11 %s
// RUN: %clang_cc1 -std=c2x -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C11 %s
//
// RUN: %clang_cc1 -std=c11 -ffinite-loops -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=FINITE %s
// RUN: %clang_cc1 -std=c11 -fno-finite-loops -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=C99 %s
int a = 0;
int b = 0;
// CHECK: datalayout
//
// CHECK-NOT: mustprogress
// CHECK-LABEL: @f0(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NOT: br {{.*}}!llvm.loop
//
void f0() {
for (; ;) ;
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @f1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label %for.body, label %for.end
// CHECK: for.body:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f1() {
for (; 1;) {
}
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @f2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %for.body, label %for.end
// CHECK: for.body:
// C99-NOT: br {{.*}} !llvm.loop
// C11: br label %for.cond, !llvm.loop [[LOOP1:!.*]]
// FINITE: br label %for.cond, !llvm.loop [[LOOP1:!.*]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f2() {
for (; a == b;) {
}
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @F(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label %for.body, label %for.end
// CHECK: for.body:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: for.end:
// CHECK-NEXT: br label %for.cond1
// CHECK: for.cond1:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %for.body2, label %for.end3
// CHECK: for.body2:
// C99-NOT: br {{.*}}, !llvm.loop
// C11: br label %for.cond1, !llvm.loop [[LOOP2:!.*]]
// FINITE: br label %for.cond1, !llvm.loop [[LOOP2:!.*]]
// CHECK: for.end3:
// CHECK-NEXT: ret void
//
void F() {
for (; 1;) {
}
for (; a == b;) {
}
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @w1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %while.body
// CHECK: while.body:
// CHECK-NOT: br {{.*}}, !llvm.loop
//
void w1() {
while (1) {
}
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @w2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %while.cond
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %while.body, label %while.end
// CHECK: while.body:
// C99-NOT: br {{.*}}, !llvm.loop
// C11: br label %while.cond, !llvm.loop [[LOOP3:!.*]]
// FINITE: br label %while.cond, !llvm.loop [[LOOP3:!.*]]
// CHECK: while.end:
// CHECK-NEXT: ret void
//
void w2() {
while (a == b) {
}
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @W(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label [[WHILE_COND:%.*]]
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %while.body, label %while.end
// CHECK: while.body:
// C99-NOT: br {{.*}} !llvm.loop
// C11: br label %while.cond, !llvm.loop [[LOOP4:!.*]]
// FINITE: br label %while.cond, !llvm.loop [[LOOP4:!.*]]
// CHECK: while.end:
// CHECK-NEXT: br label %while.body2
// CHECK: while.body2:
// CHECK-NOT: br {{.*}} !llvm.loop
//
void W() {
while (a == b) {
}
while (1) {
}
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @d1(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %do.body
// CHECK: do.body:
// CHECK-NEXT: br label %do.cond
// CHECK: do.cond:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d1() {
do {
} while (1);
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @d2(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %do.body
// CHECK: do.body:
// CHECK-NEXT: br label %do.cond
// CHECK: do.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// C99-NOT: br {{.*}}, !llvm.loop
// C11: br i1 [[CMP]], label %do.body, label %do.end, !llvm.loop [[LOOP5:!.*]]
// FINITE: br i1 [[CMP]], label %do.body, label %do.end, !llvm.loop [[LOOP5:!.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d2() {
do {
} while (a == b);
}
// CHECK-NOT: mustprogress
// CHECK-LABEL: @D(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %do.body
// CHECK: do.body:
// CHECK-NEXT: br label %do.cond
// CHECK: do.cond:
// CHECK-NOT: br label {{.*}}, !llvm.loop
// CHECK: do.end:
// CHECK-NEXT: br label %do.body1
// CHECK: do.body1:
// CHECK-NEXT: br label %do.cond2
// CHECK: do.cond2:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// C99-NOT: br {{.*}}, !llvm.loop
// C11: br i1 [[CMP]], label %do.body1, label %do.end3, !llvm.loop [[LOOP6:!.*]]
// FINITE: br i1 [[CMP]], label %do.body1, label %do.end3, !llvm.loop [[LOOP6:!.*]]
// CHECK: do.end3:
// CHECK-NEXT: ret void
//
void D() {
do {
} while (1);
do {
} while (a == b);
}
// C11: [[LOOP1]] = distinct !{[[LOOP1]], [[MP:!.*]]}
// C11: [[MP]] = !{!"llvm.loop.mustprogress"}
// C11: [[LOOP2]] = distinct !{[[LOOP2]], [[MP]]}
// C11: [[LOOP3]] = distinct !{[[LOOP3]], [[MP]]}
// C11: [[LOOP4]] = distinct !{[[LOOP4]], [[MP]]}
// C11: [[LOOP5]] = distinct !{[[LOOP5]], [[MP]]}
// C11: [[LOOP6]] = distinct !{[[LOOP6]], [[MP]]}

clang/test/CodeGenCXX/attr-mustprogress.cpp

  • This file was added.
// RUN: %clang_cc1 -std=c++98 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CXX98 %s
// RUN: %clang_cc1 -std=c++11 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CXX11 %s
// RUN: %clang_cc1 -std=c++14 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CXX11 %s
// RUN: %clang_cc1 -std=c++17 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CXX11 %s
// RUN: %clang_cc1 -std=c++20 -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CXX11 %s
// Make sure -ffinite-loops overrides -std=c++98 for loops.
// RUN: %clang_cc1 -std=c++98 -ffinite-loops -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=FINITE %s
// Make sure -fno-finite-loops overrides -std=c++11
// RUN: %clang_cc1 -std=c++11 -fno-finite-loops -triple=x86_64-unknown-linux-gnu -S -emit-llvm %s -o - | FileCheck --check-prefix=CHECK --check-prefix=CXX98 %s
int a = 0;
int b = 0;
// CHECK: datalayout
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2f0v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NOT: br {{.*}} llvm.loop
void f0() {
for (; ;) ;
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2f1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label %for.body, label %for.end
// CHECK: for.body:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f1() {
for (; 1;)
;
}
// CXX98-NOT: mustprogress
// CXX11: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2f2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %for.body, label %for.end
// CHECK: for.body:
// CXX98-NOT: br {{.*}}, !llvm.loop
// CXX11: br label %for.cond, !llvm.loop [[LOOP1:!.*]]
// FINITE-NEXT: br label %for.cond, !llvm.loop [[LOOP1:!.*]]
// CHECK: for.end:
// CHECK-NEXT: ret void
//
void f2() {
for (; a == b;)
;
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z1Fv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NEXT: br i1 true, label %for.body, label %for.end
// CHECK: for.body:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: for.end:
// CHECK-NEXT: br label %for.cond1
// CHECK: for.cond1:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %for.body2, label %for.end3
// CHECK: for.body2:
// CXX98-NOT: br {{.*}}, !llvm.loop
// CXX11-NEXT: br label %for.cond1, !llvm.loop [[LOOP2:!.*]]
// FINITE-NEXT: br label %for.cond1, !llvm.loop [[LOOP2:!.*]]
// CHECK: for.end3:
// CHECK-NEXT: ret void
//
void F() {
for (; 1;)
;
for (; a == b;)
;
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2F2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %for.cond
// CHECK: for.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %for.body, label %for.end
// CHECK: for.body:
// CXX98_NOT: br {{.*}} !llvm.loop
// CXX11-NEXT: br label %for.cond, !llvm.loop [[LOOP3:!.*]]
// FINITE-NEXT: br label %for.cond, !llvm.loop [[LOOP3:!.*]]
// CHECK: for.end:
// CHECK-NEXT: br label %for.cond1
// CHECK: for.cond1:
// CHECK-NEXT: br i1 true, label %for.body2, label %for.end3
// CHECK: for.body2:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: for.end3:
// CHECK-NEXT: ret void
//
void F2() {
for (; a == b;)
;
for (; 1;)
;
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2w1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %while.body
// CHECK: while.body:
// CHECK-NOT: br {{.*}}, !llvm.loop
//
void w1() {
while (1)
;
}
// CXX98-NOT: mustprogress
// CXX11: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2w2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %while.cond
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %while.body, label %while.end
// CHECK: while.body:
// CXX98-NOT: br {{.*}}, !llvm.loop
// CXX11-NEXT: br label %while.cond, !llvm.loop [[LOOP4:!.*]]
// FINITE-NEXT: br label %while.cond, !llvm.loop [[LOOP4:!.*]]
// CHECK: while.end:
// CHECK-NEXT: ret void
//
void w2() {
while (a == b)
;
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z1Wv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %while.cond
// CHECK: while.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CHECK-NEXT: br i1 [[CMP]], label %while.body, label %while.end
// CHECK: while.body:
// CXX98-NOT: br {{.*}}, !llvm.loop
// CXX11-NEXT: br label %while.cond, !llvm.loop [[LOOP5:!.*]]
// FINITE-NEXT: br label %while.cond, !llvm.loop [[LOOP5:!.*]]
// CHECK: while.end:
// CHECK-NEXT: br label %while.body2
// CHECK: while.body2:
// CHECK-NOT: br {{.*}}, !llvm.loop
//
void W() {
while (a == b)
;
while (1)
;
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2W2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %while.body
// CHECK: while.body:
// CHECK-NOT: br {{.*}}, !llvm.loop
//
void W2() {
while (1)
;
while (a == b)
;
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2d1v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %do.body
// CHECK: do.body:
// CHECK-NEXT: br label %do.cond
// CHECK: do.cond:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d1() {
do
;
while (1);
}
// CXX98-NOT: mustprogress
// CXX11: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2d2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %do.body
// CHECK: do.body:
// CHECK-NEXT: br label %do.cond
// CHECK: do.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CXX98-NOT: br {{.*}}, !llvm.loop
// CXX11-NEXT: br i1 [[CMP]], label %do.body, label %do.end, !llvm.loop [[LOOP6:!.*]]
// FINITE-NEXT: br i1 [[CMP]], label %do.body, label %do.end, !llvm.loop [[LOOP6:!.*]]
// CHECK: do.end:
// CHECK-NEXT: ret void
//
void d2() {
do
;
while (a == b);
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z1Dv(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %do.body
// CHECK: do.body:
// CHECK-NEXT: br label %do.cond
// CHECK: do.cond:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: do.end:
// CHECK-NEXT: br label %do.body1
// CHECK: do.body1:
// CHECK-NEXT: br label %do.cond2
// CHECK: do.cond2:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CXX98-NOT: br {{.*}}, !llvm.loop
// CXX11-NEXT: br i1 [[CMP]], label %do.body1, label %do.end3, !llvm.loop [[LOOP7:!.*]]
// FINITE-NEXT: br i1 [[CMP]], label %do.body1, label %do.end3, !llvm.loop [[LOOP7:!.*]]
// CHECK: do.end3:
// CHECK-NEXT: ret void
//
void D() {
do
;
while (1);
do
;
while (a == b);
}
// CXX98-NOT: mustprogress
// CXX11-NOT: mustprogress
// FINITE-NOT: mustprogress
// CHECK-LABEL: @_Z2D2v(
// CHECK-NEXT: entry:
// CHECK-NEXT: br label %do.body
// CHECK: do.body:
// CHECK-NEXT: br label %do.cond
// CHECK: do.cond:
// CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* @a, align 4
// CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* @b, align 4
// CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP0]], [[TMP1]]
// CXX98-NOT: br {{.*}}, !llvm.loop
// CXX11-NEXT: br i1 [[CMP]], label %do.body, label %do.end, !llvm.loop [[LOOP8:!.*]]
// FINITE-NEXT: br i1 [[CMP]], label %do.body, label %do.end, !llvm.loop [[LOOP8:!.*]]
// CHECK: do.end:
// CHECK-NEXT: br label %do.body1
// CHECK: do.body1:
// CHECK-NEXT: br label %do.cond2
// CHECK: do.cond2:
// CHECK-NOT: br {{.*}}, !llvm.loop
// CHECK: do.end3:
// CHECK-NEXT: ret void
//
void D2() {
do
;
while (a == b);
do
;
while (1);
}
// CXX11: [[LOOP1]] = distinct !{[[LOOP1]], [[MP:!.*]]}
// CXX11: [[MP]] = !{!"llvm.loop.mustprogress"}
// CXX11: [[LOOP2]] = distinct !{[[LOOP2]], [[MP]]}
// CXX11: [[LOOP3]] = distinct !{[[LOOP3]], [[MP]]}
// CXX11: [[LOOP4]] = distinct !{[[LOOP4]], [[MP]]}
// CXX11: [[LOOP5]] = distinct !{[[LOOP5]], [[MP]]}
// CXX11: [[LOOP6]] = distinct !{[[LOOP6]], [[MP]]}
// CXX11: [[LOOP7]] = distinct !{[[LOOP7]], [[MP]]}
// CXX11: [[LOOP8]] = distinct !{[[LOOP8]], [[MP]]}
clang/test/CodeGen/attr-mustprogress-0.cpp