diff options
Diffstat (limited to 'llvm/test/Transforms/SimplifyCFG/speculate-math.ll')
| -rw-r--r-- | llvm/test/Transforms/SimplifyCFG/speculate-math.ll | 42 |
1 files changed, 25 insertions, 17 deletions
diff --git a/llvm/test/Transforms/SimplifyCFG/speculate-math.ll b/llvm/test/Transforms/SimplifyCFG/speculate-math.ll index 5655d5d7882..442e8677e97 100644 --- a/llvm/test/Transforms/SimplifyCFG/speculate-math.ll +++ b/llvm/test/Transforms/SimplifyCFG/speculate-math.ll @@ -1,5 +1,4 @@ -; 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 +; RUN: opt -S -simplifycfg -phi-node-folding-threshold=2 < %s | FileCheck %s declare float @llvm.sqrt.f32(float) nounwind readonly declare float @llvm.fma.f32(float, float, float) nounwind readonly @@ -8,10 +7,19 @@ declare float @llvm.fabs.f32(float) nounwind readonly declare float @llvm.minnum.f32(float, float) nounwind readonly declare float @llvm.maxnum.f32(float, float) nounwind readonly -; ALL-LABEL: @fdiv_test( -; EXPENSIVE: select i1 %cmp, double %div, double 0.0 -; CHEAP-NOT: select +; FIXME: This is intended to be a temporary test. As discussed in +; D12882, we actually do want to speculate even expensive operations +; in SimplifyCFG because it can expose more optimizations for other +; 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) { entry: %cmp = fcmp ogt double %a, 0.0 @@ -26,8 +34,8 @@ cond.end: ret double %cond } -; ALL-LABEL: @sqrt_test( -; ALL: select +; CHECK-LABEL: @sqrt_test( +; CHECK: select define void @sqrt_test(float addrspace(1)* noalias nocapture %out, float %a) nounwind { entry: %cmp.i = fcmp olt float %a, 0.000000e+00 @@ -43,8 +51,8 @@ test_sqrt.exit: ; preds = %cond.else.i, %entry ret void } -; ALL-LABEL: @fabs_test( -; ALL: select +; CHECK-LABEL: @fabs_test( +; CHECK: select define void @fabs_test(float addrspace(1)* noalias nocapture %out, float %a) nounwind { entry: %cmp.i = fcmp olt float %a, 0.000000e+00 @@ -60,8 +68,8 @@ test_fabs.exit: ; preds = %cond.else.i, %entry ret void } -; ALL-LABEL: @fma_test( -; ALL: select +; CHECK-LABEL: @fma_test( +; CHECK: select define void @fma_test(float addrspace(1)* noalias nocapture %out, float %a, float %b, float %c) nounwind { entry: %cmp.i = fcmp olt float %a, 0.000000e+00 @@ -77,8 +85,8 @@ test_fma.exit: ; preds = %cond.else.i, %entry ret void } -; ALL-LABEL: @fmuladd_test( -; ALL: select +; CHECK-LABEL: @fmuladd_test( +; CHECK: select define void @fmuladd_test(float addrspace(1)* noalias nocapture %out, float %a, float %b, float %c) nounwind { entry: %cmp.i = fcmp olt float %a, 0.000000e+00 @@ -94,8 +102,8 @@ test_fmuladd.exit: ; preds = %cond.else.i, %en ret void } -; ALL-LABEL: @minnum_test( -; ALL: select +; CHECK-LABEL: @minnum_test( +; CHECK: select define void @minnum_test(float addrspace(1)* noalias nocapture %out, float %a, float %b) nounwind { entry: %cmp.i = fcmp olt float %a, 0.000000e+00 @@ -111,8 +119,8 @@ test_minnum.exit: ; preds = %cond.else.i, %ent ret void } -; ALL-LABEL: @maxnum_test( -; ALL: select +; CHECK-LABEL: @maxnum_test( +; CHECK: select define void @maxnum_test(float addrspace(1)* noalias nocapture %out, float %a, float %b) nounwind { entry: %cmp.i = fcmp olt float %a, 0.000000e+00 |
