[llvm] [FunctionAttrs] Improve handling of alias-preserving intrinsic calls (PR #68453)

[Nikita Popov via llvm-commits]

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@@ -0,0 +1,47 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes
+; RUN: opt -passes=function-attrs -S < %s | FileCheck --check-prefixes=COMMON,FNATTRS %s
+; RUN: opt -passes=attributor-light -S < %s | FileCheck --check-prefixes=COMMON,ATTRIBUTOR %s
+
+target triple = "amdgcn-amd-amdhsa"
+target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-p7:160:256:256:32-p8:128:128-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:7:8"
+
+define amdgpu_kernel void @test_make_buffer_rsrc(ptr %p, ptr %q) {
+; FNATTRS: Function Attrs: mustprogress nofree nosync nounwind willreturn memory(argmem: readwrite)
+; FNATTRS-LABEL: define {{[^@]+}}@test_make_buffer_rsrc
+; FNATTRS-SAME: (ptr nocapture readonly [[P:%.*]], ptr nocapture writeonly [[Q:%.*]]) #[[ATTR0:[0-9]+]] {
+; FNATTRS-NEXT:    [[P_RSRC:%.*]] = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p0(ptr [[P]], i16 0, i32 4, i32 822243328)
+; FNATTRS-NEXT:    [[Q_RSRC:%.*]] = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p0(ptr [[Q]], i16 0, i32 4, i32 822243328)
+; FNATTRS-NEXT:    [[V:%.*]] = call i8 @llvm.amdgcn.raw.ptr.buffer.load.i8(ptr addrspace(8) [[P_RSRC]], i32 0, i32 0, i32 0)
+; FNATTRS-NEXT:    call void @llvm.amdgcn.raw.ptr.buffer.store.i8(i8 [[V]], ptr addrspace(8) [[Q_RSRC]], i32 0, i32 0, i32 0)
+; FNATTRS-NEXT:    ret void
+;
+; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite)
+; ATTRIBUTOR-LABEL: define {{[^@]+}}@test_make_buffer_rsrc
+; ATTRIBUTOR-SAME: (ptr nocapture nofree readonly [[P:%.*]], ptr nocapture nofree writeonly [[Q:%.*]]) #[[ATTR0:[0-9]+]] {
+; ATTRIBUTOR-NEXT:    [[P_RSRC:%.*]] = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p0(ptr [[P]], i16 0, i32 4, i32 822243328) #[[ATTR4:[0-9]+]]
+; ATTRIBUTOR-NEXT:    [[Q_RSRC:%.*]] = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p0(ptr [[Q]], i16 0, i32 4, i32 822243328) #[[ATTR4]]
+; ATTRIBUTOR-NEXT:    [[V:%.*]] = call i8 @llvm.amdgcn.raw.ptr.buffer.load.i8(ptr addrspace(8) nocapture readonly [[P_RSRC]], i32 0, i32 0, i32 0) #[[ATTR5:[0-9]+]]
+; ATTRIBUTOR-NEXT:    call void @llvm.amdgcn.raw.ptr.buffer.store.i8(i8 [[V]], ptr addrspace(8) nocapture writeonly [[Q_RSRC]], i32 0, i32 0, i32 0) #[[ATTR6:[0-9]+]]
+; ATTRIBUTOR-NEXT:    ret void
+;
+  %p.rsrc = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p0(ptr %p, i16 0, i32 4, i32 822243328)
+  %q.rsrc = call ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p0(ptr %q, i16 0, i32 4, i32 822243328)
+  %v = call i8 @llvm.amdgcn.raw.ptr.buffer.load.i8(ptr addrspace(8) %p.rsrc, i32 0, i32 0, i32 0)
+  call void @llvm.amdgcn.raw.ptr.buffer.store.i8(i8 %v, ptr addrspace(8) %q.rsrc, i32 0, i32 0, i32 0)
+  ret void
+}
+
+; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
+declare ptr addrspace(8) @llvm.amdgcn.make.buffer.rsrc.p0(ptr nocapture readnone, i16, i32, i32) #0
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nikic wrote:

Drop nocapture here to match new intrinsic signature?

https://github.com/llvm/llvm-project/pull/68453