[llvm] r212999 - Look through addrspacecast in GetPointerBaseWithConstantOffset
Matt Arsenault
Matthew.Arsenault at amd.com
Mon Jul 14 15:39:23 PDT 2014
Author: arsenm
Date: Mon Jul 14 17:39:22 2014
New Revision: 212999
URL: http://llvm.org/viewvc/llvm-project?rev=212999&view=rev
Log:
Look through addrspacecast in GetPointerBaseWithConstantOffset
Modified:
llvm/trunk/lib/Analysis/ValueTracking.cpp
llvm/trunk/test/Transforms/GVN/rle.ll
Modified: llvm/trunk/lib/Analysis/ValueTracking.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ValueTracking.cpp?rev=212999&r1=212998&r2=212999&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/ValueTracking.cpp (original)
+++ llvm/trunk/lib/Analysis/ValueTracking.cpp Mon Jul 14 17:39:22 2014
@@ -1731,7 +1731,8 @@ Value *llvm::GetPointerBaseWithConstantO
}
Ptr = GEP->getPointerOperand();
- } else if (Operator::getOpcode(Ptr) == Instruction::BitCast) {
+ } else if (Operator::getOpcode(Ptr) == Instruction::BitCast ||
+ Operator::getOpcode(Ptr) == Instruction::AddrSpaceCast) {
Ptr = cast<Operator>(Ptr)->getOperand(0);
} else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(Ptr)) {
if (GA->mayBeOverridden())
Modified: llvm/trunk/test/Transforms/GVN/rle.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/GVN/rle.ll?rev=212999&r1=212998&r2=212999&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/GVN/rle.ll (original)
+++ llvm/trunk/test/Transforms/GVN/rle.ll Mon Jul 14 17:39:22 2014
@@ -318,6 +318,19 @@ define i8 @coerce_offset0(i32 %V, i32* %
; CHECK: ret i8
}
+define i8 @coerce_offset0_addrspacecast(i32 %V, i32* %P) {
+ store i32 %V, i32* %P
+
+ %P2 = addrspacecast i32* %P to i8 addrspace(1)*
+ %P3 = getelementptr i8 addrspace(1)* %P2, i32 2
+
+ %A = load i8 addrspace(1)* %P3
+ ret i8 %A
+; CHECK-LABEL: @coerce_offset0_addrspacecast(
+; CHECK-NOT: load
+; CHECK: ret i8
+}
+
;; non-local i32/float -> i8 load forwarding.
define i8 @coerce_offset_nonlocal0(i32* %P, i1 %cond) {
%P2 = bitcast i32* %P to float*
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