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Differential D130224 Diff 447993 clang/test/CodeGen/attr-maybeundef.c

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clang/test/CodeGen/attr-maybeundef.c

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// RUN: %clang_cc1 -no-opaque-pointers -emit-llvm %s -o - | FileCheck %s
#define __maybe_undef __attribute__((maybe_undef))
// CHECK: define dso_local void @t1(i32 noundef [[TMP1:%.*]], i32 noundef [[TMP2:%.*]], float noundef [[TMP3:%.*]])
// CHECK-NEXT: entry:
// CHECK-NEXT: [[TMP4:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[TMP5:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[TMP6:%.*]] = alloca float, align 4
// CHECK-NEXT: store i32 [[TMP1:%.*]], i32* [[TMP4:%.*]], align 4
// CHECK-NEXT: store i32 [[TMP2:%.*]], i32* [[TMP5:%.*]], align 4
// CHECK-NEXT: store float [[TMP3:%.*]], float* [[TMP6:%.*]], align 4
// CHECK-NEXT: ret void
// CHECK: define dso_local void @t2(i32 noundef [[TMP1:%.*]], i32 noundef [[TMP2:%.*]], float noundef [[TMP3:%.*]])
// CHECK-NEXT: entry:
// CHECK-NEXT: [[TMP4:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[TMP5:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[TMP6:%.*]] = alloca float, align 4
// CHECK-NEXT: store i32 [[TMP1:%.*]], i32* [[TMP4:%.*]], align 4
// CHECK-NEXT: store i32 [[TMP2:%.*]], i32* [[TMP5:%.*]], align 4
// CHECK-NEXT: store float [[TMP3:%.*]], float* [[TMP6:%.*]], align 4
// CHECK-NEXT: [[TMP7:%.*]] = load i32, i32* [[TMP4:%.*]], align 4
// CHECK-NEXT: [[TMP8:%.*]] = load i32, i32* [[TMP5:%.*]], align 4
// CHECK-NEXT: [[TMP9:%.*]] = load float, float* [[TMP6:%.*]], align 4
// CHECK-NEXT: [[TMP10:%.*]] = freeze i32 [[TMP8:%.*]]
// CHECK-NEXT: call void @t1(i32 noundef [[TMP7:%.*]], i32 noundef [[TMP10:%.*]], float noundef [[TMP9:%.*]])
// CHECK-NEXT: ret void
void t1(int param1, int __maybe_undef param2, float param3) {}
// expected-error {{'maybe_undef' attribute only applies to parameters [-Wignored-attributes]}}
void __maybe_undef t2(int param1, int param2, float param3) {
t1(param1, param2, param3);
}
// CHECK: define dso_local void @TestVariadicFunction(i32 noundef [[TMP0:%.*]], ...)
// CHECK-NEXT: entry:
// CHECK-NEXT: [[TMP1:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[TMP2:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[TMP0:%.*]], i32* [[TMP1:%.*]], align 4
// CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP1:%.*]], align 4
// CHECK-NEXT: [[TMP4:%.*]] = load i32, i32* [[TMP2:%.*]], align 4
// CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* [[TMP2:%.*]], align 4
// CHECK-NEXT: [[TMP5:%.*]] = freeze i32 [[TMP2:%.*]]
// CHECK-NEXT: call void (i32, ...) @VariadicFunction(i32 noundef [[TMP6:%.*]], i32 noundef [[TMP4:%.*]], i32 noundef [[TMP5:%.*]])
// CHECK-NEXT: ret void
// CHECK: declare void @VariadicFunction(i32 noundef, ...)
aaron.ballmanUnsubmitted
Not Done
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It looks like dso_local is missing here on Windows and expected to be missing on Linux? Not certain what's up with that...

aaron.ballman: It looks like dso_local is missing here on Windows and expected to be missing on Linux? Not…
skc7AuthorUnsubmitted
Done
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On Linux, dso_local isn't present.
declare void @VariadicFunction(i32 noundef, ...)

skc7: On Linux, dso_local isn't present. declare void @VariadicFunction(i32 noundef, ...)
void VariadicFunction(int __maybe_undef x, ...);
void TestVariadicFunction(int x, ...) {
int Var;
return VariadicFunction(x, Var, Var);
}
// CHECK: define dso_local void @other()
// CHECK-NEXT: entry:
// CHECK-NEXT: [[TMP1:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[TMP1:%.*]], align 4
// CHECK-NEXT: call void @func(i32 noundef [[TMP2:%.*]])
// CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP1:%.*]], align 4
// CHECK-NEXT: [[TMP4:%.*]] = freeze i32 [[TMP3:%.*]]
// CHECK-NEXT: call void @func1(i32 noundef [[TMP4:%.*]])
// CHECK-NEXT: ret void
// CHECK: define dso_local void @func(i32 noundef [[TMP1:%.*]])
// CHECK-NEXT: entry:
// CHECK-NEXT: [[TMP2:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[TMP1:%.*]], i32* [[TMP2:%.*]], align 4
// CHECK-NEXT: ret void
// CHECK: define dso_local void @func1(i32 noundef [[TMP1:%.*]])
// CHECK-NEXT: entry:
// CHECK-NEXT: [[TMP2:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[TMP1:%.*]], i32* [[TMP2:%.*]], align 4
// CHECK-NEXT: ret void
void func(int param);
void func1(int __maybe_undef param);
void other() {
int Var;
func(Var);
func1(Var);
}
void func(__maybe_undef int param) {}
void func1(int param) {}
// CHECK: define dso_local void @foo(i32 noundef [[TMP1:%.*]])
// CHECK-NEXT: entry:
// CHECK-NEXT: [[TMP2:%.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 [[TMP1:%.*]], i32* [[TMP2:%.*]], align 4
// CHECK-NEXT: ret void
// CHECK: define dso_local void @bar()
// CHECK-NEXT: entry:
// CHECK-NEXT: [[TMP1:%.*]] = alloca i32, align 4
// CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[TMP1:%.*]], align 4
// CHECK-NEXT: call void @foo(i32 noundef [[TMP2:%.*]])
// CHECK-NEXT: ret void
void foo(__maybe_undef int param);
void foo(int param) {}
void bar() {
int Var;
foo(Var);
}