[llvm] r191036 - InstCombine: Don't allow turning vector-of-pointer loads into vector-of-integer.
Benjamin Kramer
benny.kra at googlemail.com
Thu Sep 19 13:59:04 PDT 2013
Author: d0k
Date: Thu Sep 19 15:59:04 2013
New Revision: 191036
URL: http://llvm.org/viewvc/llvm-project?rev=191036&view=rev
Log:
InstCombine: Don't allow turning vector-of-pointer loads into vector-of-integer.
The code below can't handle any pointers. PR17293.
Modified:
llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
llvm/trunk/test/Transforms/InstCombine/bitcast.ll
Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp?rev=191036&r1=191035&r2=191036&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp (original)
+++ llvm/trunk/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp Thu Sep 19 15:59:04 2013
@@ -318,7 +318,8 @@ static Instruction *InstCombineLoadCast(
SrcPTy->isVectorTy()) &&
// Do not allow turning this into a load of an integer, which is then
// casted to a pointer, this pessimizes pointer analysis a lot.
- (SrcPTy->isPointerTy() == LI.getType()->isPointerTy()) &&
+ (SrcPTy->isPtrOrPtrVectorTy() ==
+ LI.getType()->isPtrOrPtrVectorTy()) &&
IC.getDataLayout()->getTypeSizeInBits(SrcPTy) ==
IC.getDataLayout()->getTypeSizeInBits(DestPTy)) {
Modified: llvm/trunk/test/Transforms/InstCombine/bitcast.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/bitcast.ll?rev=191036&r1=191035&r2=191036&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/bitcast.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/bitcast.ll Thu Sep 19 15:59:04 2013
@@ -144,3 +144,13 @@ define <2 x i16> @BitcastInsert(i32 %a)
; CHECK-LABEL: @BitcastInsert(
; CHECK: bitcast i32 %a to <2 x i16>
}
+
+; PR17293
+define <2 x i64> @test7(<2 x i8*>* %arg) nounwind {
+ %cast = bitcast <2 x i8*>* %arg to <2 x i64>*
+ %load = load <2 x i64>* %cast, align 16
+ ret <2 x i64> %load
+; CHECK: @test7
+; CHECK: bitcast
+; CHECK: load
+}
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