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[InferAddressSpaces] Check if AS are the same in isNoopPtrIntCastPair
isNoopAddrSpaceCast is expecting SrcAS is different from DestAS. If the two AS are the same, consider ptrtoint/inttoptr as noop cast. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D123573
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llvm/test/Transforms/InferAddressSpaces/X86/noop-ptrint-pair.ll
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; RUN: opt -mtriple=x86_64-unknown-unknown -S -o - -infer-address-spaces -assume-default-is-flat-addrspace %s | FileCheck %s | ||
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; Check that assert in X86TargetMachine::isNoopAddrSpaceCast is not triggered. | ||
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target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5-ni:7" | ||
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; CHECK-LABEL: @noop_ptrint_pair( | ||
; CHECK: addrspacecast i32 addrspace(1)* %x to i32 addrspace(4)* | ||
; CHECK-NEXT: ptrtoint i32 addrspace(4)* %{{.*}} to i64 | ||
; CHECK-NEXT: inttoptr i64 %{{.*}} to i32 addrspace(4)* | ||
define void @noop_ptrint_pair(i32 addrspace(1)* %x) { | ||
%1 = addrspacecast i32 addrspace(1)* %x to i32 addrspace(4)* | ||
%2 = ptrtoint i32 addrspace(4)* %1 to i64 | ||
%3 = inttoptr i64 %2 to i32 addrspace(4)* | ||
ret void | ||
} |