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Differential D15213 Diff 42872 llvm/trunk/test/Transforms/SimplifyCFG/speculate-math.ll

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llvm/trunk/test/Transforms/SimplifyCFG/speculate-math.ll

; RUN: opt -S -simplifycfg -phi-node-folding-threshold=2 < %s | FileCheck %s ; RUN: opt -S -simplifycfg < %s | FileCheck %s --check-prefix=EXPENSIVE --check-prefix=ALL
; RUN: opt -S -simplifycfg -speculate-one-expensive-inst=false < %s | FileCheck %s --check-prefix=CHEAP --check-prefix=ALL
declare float @llvm.sqrt.f32(float) nounwind readonly declare float @llvm.sqrt.f32(float) nounwind readonly
declare float @llvm.fma.f32(float, float, float) nounwind readonly declare float @llvm.fma.f32(float, float, float) nounwind readonly
declare float @llvm.fmuladd.f32(float, float, float) nounwind readonly declare float @llvm.fmuladd.f32(float, float, float) nounwind readonly
declare float @llvm.fabs.f32(float) nounwind readonly declare float @llvm.fabs.f32(float) nounwind readonly
declare float @llvm.minnum.f32(float, float) nounwind readonly declare float @llvm.minnum.f32(float, float) nounwind readonly
declare float @llvm.maxnum.f32(float, float) nounwind readonly declare float @llvm.maxnum.f32(float, float) nounwind readonly
; FIXME: This is intended to be a temporary test. As discussed in ; ALL-LABEL: @fdiv_test(
; D12882, we actually do want to speculate even expensive operations ; EXPENSIVE: select i1 %cmp, double %div, double 0.0
; in SimplifyCFG because it can expose more optimizations for other ; CHEAP-NOT: select
; passes. Therefore, we either need to adjust SimplifyCFG's
; calculations that use the TTI cost model or use a different cost
; model for deciding which ops should be speculated in SimplifyCFG.
; We should also be using the TTI cost model later - for example in
; CodeGenPrepare - to potentially undo this speculation.
; Do not speculate fdiv by default because it is generally expensive.
; CHECK-LABEL: @fdiv_test(
; CHECK-NOT: select
define double @fdiv_test(double %a, double %b) { define double @fdiv_test(double %a, double %b) {
entry: entry:
%cmp = fcmp ogt double %a, 0.0 %cmp = fcmp ogt double %a, 0.0
br i1 %cmp, label %cond.true, label %cond.end br i1 %cmp, label %cond.true, label %cond.end
cond.true: cond.true:
%div = fdiv double %b, %a %div = fdiv double %b, %a
br label %cond.end br label %cond.end
cond.end: cond.end:
%cond = phi double [ %div, %cond.true ], [ 0.0, %entry ] %cond = phi double [ %div, %cond.true ], [ 0.0, %entry ]
ret double %cond ret double %cond
} }
; CHECK-LABEL: @sqrt_test( ; ALL-LABEL: @sqrt_test(
; CHECK: select ; ALL: select
define void @sqrt_test(float addrspace(1)* noalias nocapture %out, float %a) nounwind { define void @sqrt_test(float addrspace(1)* noalias nocapture %out, float %a) nounwind {
entry: entry:
%cmp.i = fcmp olt float %a, 0.000000e+00 %cmp.i = fcmp olt float %a, 0.000000e+00
br i1 %cmp.i, label %test_sqrt.exit, label %cond.else.i br i1 %cmp.i, label %test_sqrt.exit, label %cond.else.i
cond.else.i: ; preds = %entry cond.else.i: ; preds = %entry
%0 = tail call float @llvm.sqrt.f32(float %a) nounwind readnone %0 = tail call float @llvm.sqrt.f32(float %a) nounwind readnone
br label %test_sqrt.exit br label %test_sqrt.exit
test_sqrt.exit: ; preds = %cond.else.i, %entry test_sqrt.exit: ; preds = %cond.else.i, %entry
%cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ] %cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ]
store float %cond.i, float addrspace(1)* %out, align 4 store float %cond.i, float addrspace(1)* %out, align 4
ret void ret void
} }
; CHECK-LABEL: @fabs_test( ; ALL-LABEL: @fabs_test(
; CHECK: select ; ALL: select
define void @fabs_test(float addrspace(1)* noalias nocapture %out, float %a) nounwind { define void @fabs_test(float addrspace(1)* noalias nocapture %out, float %a) nounwind {
entry: entry:
%cmp.i = fcmp olt float %a, 0.000000e+00 %cmp.i = fcmp olt float %a, 0.000000e+00
br i1 %cmp.i, label %test_fabs.exit, label %cond.else.i br i1 %cmp.i, label %test_fabs.exit, label %cond.else.i
cond.else.i: ; preds = %entry cond.else.i: ; preds = %entry
%0 = tail call float @llvm.fabs.f32(float %a) nounwind readnone %0 = tail call float @llvm.fabs.f32(float %a) nounwind readnone
br label %test_fabs.exit br label %test_fabs.exit
test_fabs.exit: ; preds = %cond.else.i, %entry test_fabs.exit: ; preds = %cond.else.i, %entry
%cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ] %cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ]
store float %cond.i, float addrspace(1)* %out, align 4 store float %cond.i, float addrspace(1)* %out, align 4
ret void ret void
} }
; CHECK-LABEL: @fma_test( ; ALL-LABEL: @fma_test(
; CHECK: select ; ALL: select
define void @fma_test(float addrspace(1)* noalias nocapture %out, float %a, float %b, float %c) nounwind { define void @fma_test(float addrspace(1)* noalias nocapture %out, float %a, float %b, float %c) nounwind {
entry: entry:
%cmp.i = fcmp olt float %a, 0.000000e+00 %cmp.i = fcmp olt float %a, 0.000000e+00
br i1 %cmp.i, label %test_fma.exit, label %cond.else.i br i1 %cmp.i, label %test_fma.exit, label %cond.else.i
cond.else.i: ; preds = %entry cond.else.i: ; preds = %entry
%0 = tail call float @llvm.fma.f32(float %a, float %b, float %c) nounwind readnone %0 = tail call float @llvm.fma.f32(float %a, float %b, float %c) nounwind readnone
br label %test_fma.exit br label %test_fma.exit
test_fma.exit: ; preds = %cond.else.i, %entry test_fma.exit: ; preds = %cond.else.i, %entry
%cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ] %cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ]
store float %cond.i, float addrspace(1)* %out, align 4 store float %cond.i, float addrspace(1)* %out, align 4
ret void ret void
} }
; CHECK-LABEL: @fmuladd_test( ; ALL-LABEL: @fmuladd_test(
; CHECK: select ; ALL: select
define void @fmuladd_test(float addrspace(1)* noalias nocapture %out, float %a, float %b, float %c) nounwind { define void @fmuladd_test(float addrspace(1)* noalias nocapture %out, float %a, float %b, float %c) nounwind {
entry: entry:
%cmp.i = fcmp olt float %a, 0.000000e+00 %cmp.i = fcmp olt float %a, 0.000000e+00
br i1 %cmp.i, label %test_fmuladd.exit, label %cond.else.i br i1 %cmp.i, label %test_fmuladd.exit, label %cond.else.i
cond.else.i: ; preds = %entry cond.else.i: ; preds = %entry
%0 = tail call float @llvm.fmuladd.f32(float %a, float %b, float %c) nounwind readnone %0 = tail call float @llvm.fmuladd.f32(float %a, float %b, float %c) nounwind readnone
br label %test_fmuladd.exit br label %test_fmuladd.exit
test_fmuladd.exit: ; preds = %cond.else.i, %entry test_fmuladd.exit: ; preds = %cond.else.i, %entry
%cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ] %cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ]
store float %cond.i, float addrspace(1)* %out, align 4 store float %cond.i, float addrspace(1)* %out, align 4
ret void ret void
} }
; CHECK-LABEL: @minnum_test( ; ALL-LABEL: @minnum_test(
; CHECK: select ; ALL: select
define void @minnum_test(float addrspace(1)* noalias nocapture %out, float %a, float %b) nounwind { define void @minnum_test(float addrspace(1)* noalias nocapture %out, float %a, float %b) nounwind {
entry: entry:
%cmp.i = fcmp olt float %a, 0.000000e+00 %cmp.i = fcmp olt float %a, 0.000000e+00
br i1 %cmp.i, label %test_minnum.exit, label %cond.else.i br i1 %cmp.i, label %test_minnum.exit, label %cond.else.i
cond.else.i: ; preds = %entry cond.else.i: ; preds = %entry
%0 = tail call float @llvm.minnum.f32(float %a, float %b) nounwind readnone %0 = tail call float @llvm.minnum.f32(float %a, float %b) nounwind readnone
br label %test_minnum.exit br label %test_minnum.exit
test_minnum.exit: ; preds = %cond.else.i, %entry test_minnum.exit: ; preds = %cond.else.i, %entry
%cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ] %cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ]
store float %cond.i, float addrspace(1)* %out, align 4 store float %cond.i, float addrspace(1)* %out, align 4
ret void ret void
} }
; CHECK-LABEL: @maxnum_test( ; ALL-LABEL: @maxnum_test(
; CHECK: select ; ALL: select
define void @maxnum_test(float addrspace(1)* noalias nocapture %out, float %a, float %b) nounwind { define void @maxnum_test(float addrspace(1)* noalias nocapture %out, float %a, float %b) nounwind {
entry: entry:
%cmp.i = fcmp olt float %a, 0.000000e+00 %cmp.i = fcmp olt float %a, 0.000000e+00
br i1 %cmp.i, label %test_maxnum.exit, label %cond.else.i br i1 %cmp.i, label %test_maxnum.exit, label %cond.else.i
cond.else.i: ; preds = %entry cond.else.i: ; preds = %entry
%0 = tail call float @llvm.maxnum.f32(float %a, float %b) nounwind readnone %0 = tail call float @llvm.maxnum.f32(float %a, float %b) nounwind readnone
br label %test_maxnum.exit br label %test_maxnum.exit
test_maxnum.exit: ; preds = %cond.else.i, %entry test_maxnum.exit: ; preds = %cond.else.i, %entry
%cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ] %cond.i = phi float [ %0, %cond.else.i ], [ 0x7FF8000000000000, %entry ]
store float %cond.i, float addrspace(1)* %out, align 4 store float %cond.i, float addrspace(1)* %out, align 4
ret void ret void
} }