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GVN: Handle addrspacecast 

llvm-svn: 361103
This commit is contained in:
Matt Arsenault 2019-05-18 14:36:06 +00:00
parent d1be3c446e
commit b04f3258dd
2 changed files with 21 additions and 0 deletions
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1
llvm/lib/Transforms/Scalar/GVN.cpp
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@ -523,6 +523,7 @@ uint32_t GVN::ValueTable::lookupOrAdd(Value *V) {
case Instruction::FPExt:
case Instruction::PtrToInt:
case Instruction::IntToPtr:
case Instruction::AddrSpaceCast:
case Instruction::BitCast:
case Instruction::Select:
case Instruction::ExtractElement:

20
llvm/test/Transforms/GVN/addrspacecast.ll Normal file
View File

@ -0,0 +1,20 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -gvn -S | FileCheck %s
; RUN: opt < %s -passes=gvn -S | FileCheck %s
define i32 addrspace(1)* @addrspacecast(i32* %ptr) {
; CHECK-LABEL: @addrspacecast(
; CHECK-NEXT: block1:
; CHECK-NEXT: [[Z1:%.*]] = addrspacecast i32* [[PTR:%.*]] to i32 addrspace(1)*
; CHECK-NEXT: store i32 addrspace(1)* [[Z1]], i32 addrspace(1)** undef
; CHECK-NEXT: ret i32 addrspace(1)* [[Z1]]
;
block1:
%z1 = addrspacecast i32* %ptr to i32 addrspace(1)*
store i32 addrspace(1)* %z1, i32 addrspace(1)** undef
br label %block2
block2:
%z2 = addrspacecast i32* %ptr to i32 addrspace(1)*
ret i32 addrspace(1)* %z2
}