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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 52; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -passes=instcombine %s | FileCheck %s3 4; Check that `select B, true, C` isn't optimized to `or B, C`,5; because the invalid addrspacecast %asc.shared introduces poison.6define i1 @not_fold_select(ptr addrspace(1) noundef %x) {7; CHECK-LABEL: define i1 @not_fold_select(8; CHECK-SAME: ptr addrspace(1) noundef [[X:%.*]]) {9; CHECK-NEXT: [[ENTRY:.*:]]10; CHECK-NEXT: [[TMP0:%.*]] = addrspacecast ptr addrspace(1) [[X]] to ptr11; CHECK-NEXT: [[TMP1:%.*]] = tail call i1 @llvm.amdgcn.is.shared(ptr [[TMP0]])12; CHECK-NEXT: [[TMP2:%.*]] = addrspacecast ptr addrspace(1) [[X]] to ptr addrspace(3)13; CHECK-NEXT: [[TMP3:%.*]] = icmp eq ptr addrspace(3) [[TMP2]], null14; CHECK-NEXT: [[NOT_IS_SHARED:%.*]] = xor i1 [[TMP1]], true15; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[NOT_IS_SHARED]], i1 true, i1 [[TMP3]]16; CHECK-NEXT: ret i1 [[TMP4]]17;18 entry:19 %asc.flat = addrspacecast ptr addrspace(1) %x to ptr20 %is.shared = tail call i1 @llvm.amdgcn.is.shared(ptr %asc.flat)21 %asc.shared = addrspacecast ptr %asc.flat to ptr addrspace(3)22 %shared.addr = select i1 %is.shared, ptr addrspace(3) %asc.shared, ptr addrspace(3) null23 %result = icmp eq ptr addrspace(3) %shared.addr, null24 ret i1 %result25}26