[llvm] [InstCombine]PtrReplacer: Correctly handle select with unavailable operands (PR #148829)

[Anshil Gandhi via llvm-commits]

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@@ -0,0 +1,35 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -passes=instcombine < %s | FileCheck %s
+
+; Crashed in IC PtrReplacer because an invalid select was generated with addrspace(4) and addrspace(5)
+; operands.
+
+define amdgpu_kernel void @eggs(ptr addrspace(4) byref([12 x i8]) align 16 %arg) {
+; CHECK-LABEL: define amdgpu_kernel void @eggs(
+; CHECK-SAME: ptr addrspace(4) byref([12 x i8]) align 16 [[ARG:%.*]]) {
+; CHECK-NEXT:  [[BB:.*:]]
+; CHECK-NEXT:    ret void
+;
+bb:
+  %alloca = alloca i32, i32 0, align 8, addrspace(5)
+  %alloca1 = alloca [12 x i8], align 16, addrspace(5)
+  call void @llvm.memcpy.p5.p4.i64(ptr addrspace(5) %alloca1, ptr addrspace(4) %arg, i64 0, i1 false)
+  %select = select i1 false, ptr addrspace(5) %alloca1, ptr addrspace(5) %alloca
+  call void @llvm.memcpy.p0.p5.i64(ptr null, ptr addrspace(5) %select, i64 0, i1 false)
+  ret void
+}
+
+define amdgpu_kernel void @milk(ptr addrspace(4) byref([12 x i8]) align 16 %arg) {
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gandhi56 wrote:

ditto

https://github.com/llvm/llvm-project/pull/148829