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InstCombine: Fix and simplify the inttoptr side too.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174438 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2013-02-05 20:22:40 +00:00
parent 07b884af25
commit 39b5f12dd6
2 changed files with 24 additions and 13 deletions
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21
lib/Transforms/InstCombine/InstCombineCasts.cpp
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@ -1322,19 +1322,14 @@ Instruction *InstCombiner::visitIntToPtr(IntToPtrInst &CI) {
// If the source integer type is not the intptr_t type for this target, do a
// trunc or zext to the intptr_t type, then inttoptr of it. This allows the
// cast to be exposed to other transforms.
if (TD) {
if (CI.getOperand(0)->getType()->getScalarSizeInBits() >
TD->getPointerSizeInBits()) {
Value *P = Builder->CreateTrunc(CI.getOperand(0),
TD->getIntPtrType(CI.getContext()));
return new IntToPtrInst(P, CI.getType());
}
if (CI.getOperand(0)->getType()->getScalarSizeInBits() <
TD->getPointerSizeInBits()) {
Value *P = Builder->CreateZExt(CI.getOperand(0),
TD->getIntPtrType(CI.getContext()));
return new IntToPtrInst(P, CI.getType());
}
if (TD && CI.getOperand(0)->getType()->getScalarSizeInBits() !=
TD->getPointerSizeInBits()) {
Type *Ty = TD->getIntPtrType(CI.getContext());
if (CI.getType()->isVectorTy()) // Handle vectors of pointers.
Ty = VectorType::get(Ty, CI.getType()->getVectorNumElements());
Value *P = Builder->CreateZExtOrTrunc(CI.getOperand(0), Ty);
return new IntToPtrInst(P, CI.getType());
}
if (Instruction *I = commonCastTransforms(CI))

16
test/Transforms/InstCombine/ptr-int-cast.ll
View File

@ -42,3 +42,19 @@ define <4 x i128> @test5(<4 x i8*> %arg) nounwind {
%p1 = ptrtoint <4 x i8*> %arg to <4 x i128>
ret <4 x i128> %p1
}
define <4 x i8*> @test6(<4 x i32> %arg) nounwind {
; CHECK: @test6
; CHECK: zext <4 x i32> %arg to <4 x i64>
; CHECK: inttoptr <4 x i64> %1 to <4 x i8*>
%p1 = inttoptr <4 x i32> %arg to <4 x i8*>
ret <4 x i8*> %p1
}
define <4 x i8*> @test7(<4 x i128> %arg) nounwind {
; CHECK: @test7
; CHECK: trunc <4 x i128> %arg to <4 x i64>
; CHECK: inttoptr <4 x i64> %1 to <4 x i8*>
%p1 = inttoptr <4 x i128> %arg to <4 x i8*>
ret <4 x i8*> %p1
}