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Have InstCombine call SipmlifyCall when handling calls. Test case included.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174675 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Ilseman 2013-02-07 23:01:35 +00:00
parent 4fae15e664
commit 3854a5d90f
2 changed files with 20 additions and 2 deletions
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6
lib/Transforms/InstCombine/InstCombineCalls.cpp
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@ -13,6 +13,7 @@
#include "InstCombine.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/MemoryBuiltins.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/Support/CallSite.h"
@ -210,6 +211,11 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
return &CI;
}
CallSite CS(&CI);
if (Value *V = SimplifyCall(CS.getCalledValue(), CS.arg_begin(), CS.arg_end(),
TD))
return ReplaceInstUsesWith(CI, V);
IntrinsicInst *II = dyn_cast<IntrinsicInst>(&CI);
if (!II) return visitCallSite(&CI);

16
test/Transforms/InstCombine/intrinsics.ll
View File

@ -152,8 +152,8 @@ entry:
ret void
; CHECK: @powi
; CHECK: %A = fdiv double 1.0{{.*}}, %V
; CHECK: store volatile double %A,
; CHECK: store volatile double 1.0
; CHECK: store volatile double %A,
; CHECK: store volatile double 1.0
; CHECK: store volatile double %V
}
@ -256,3 +256,15 @@ define i32 @cttz_select(i32 %Value) nounwind {
; CHECK: @cttz_select
; CHECK: select i1 %tobool, i32 %cttz, i32 32
}
; Test that SimplifyCall is getting invoked by InstCombine
declare float @llvm.fabs.f32(float) nounwind readnone
define float @simplify_idempotent(float %a) {
; CHECK: @simplify_idempotent
; CHECK: fabs
; CHECK-NOT: fabs
%a0 = call float @llvm.fabs.f32(float %a)
%a1 = call float @llvm.fabs.f32(float %a0)
ret float %a1
}