[llvm] AMDGPU: Mark sendmsg intrinsics as nocallback (PR #126782)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,86 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-attributes --check-globals all --version 5
+; RUN: opt -S -passes=function-attrs < %s | FileCheck --check-prefixes=COMMON,FNATTRS %s
+; RUN: opt -S -passes=attributor-light < %s | FileCheck --check-prefixes=COMMON,ATTRIBUTOR %s
+
+define internal void @sendmsg_is_norecurse() {
+; FNATTRS: Function Attrs: mustprogress norecurse nounwind willreturn
+; FNATTRS-LABEL: define internal void @sendmsg_is_norecurse(
+; FNATTRS-SAME: ) #[[ATTR0:[0-9]+]] {
+; FNATTRS-NEXT:    call void @llvm.amdgcn.s.sendmsg(i32 1, i32 0)
+; FNATTRS-NEXT:    ret void
+;
+; ATTRIBUTOR: Function Attrs: mustprogress norecurse nounwind willreturn
+; ATTRIBUTOR-LABEL: define internal void @sendmsg_is_norecurse(
+; ATTRIBUTOR-SAME: ) #[[ATTR0:[0-9]+]] {
+; ATTRIBUTOR-NEXT:    call void @llvm.amdgcn.s.sendmsg(i32 1, i32 0) #[[ATTR7:[0-9]+]]
+; ATTRIBUTOR-NEXT:    ret void
+;
+  call void @llvm.amdgcn.s.sendmsg(i32 1, i32 0)
+  ret void
+}
+
+define internal void @sendmsghalt_is_norecurse() {
+; COMMON: Function Attrs: norecurse nounwind
+; COMMON-LABEL: define internal void @sendmsghalt_is_norecurse(
+; COMMON-SAME: ) #[[ATTR1:[0-9]+]] {
+; COMMON-NEXT:    call void @llvm.amdgcn.s.sendmsghalt(i32 1, i32 0)
+; COMMON-NEXT:    ret void
+;
+  call void @llvm.amdgcn.s.sendmsghalt(i32 1, i32 0)
+  ret void
+}
+
+define internal i32 @sendmsg_rtn_is_norecurse() {
+; FNATTRS: Function Attrs: mustprogress norecurse nounwind willreturn
+; FNATTRS-LABEL: define internal i32 @sendmsg_rtn_is_norecurse(
+; FNATTRS-SAME: ) #[[ATTR0]] {
+; FNATTRS-NEXT:    [[RES:%.*]] = call i32 @llvm.amdgcn.s.sendmsg.rtn.i32(i32 1)
+; FNATTRS-NEXT:    ret i32 [[RES]]
+;
+; ATTRIBUTOR: Function Attrs: mustprogress nounwind willreturn
+; ATTRIBUTOR-LABEL: define internal i32 @sendmsg_rtn_is_norecurse(
+; ATTRIBUTOR-SAME: ) #[[ATTR2:[0-9]+]] {
+; ATTRIBUTOR-NEXT:    [[RES:%.*]] = call i32 @llvm.amdgcn.s.sendmsg.rtn.i32(i32 1) #[[ATTR7]]
+; ATTRIBUTOR-NEXT:    ret i32 [[RES]]
+;
+  %res = call i32 @llvm.amdgcn.s.sendmsg.rtn(i32 1)
+  ret i32 %res
+}
+
+define void @user() {
+; FNATTRS-LABEL: define void @user() {
+; FNATTRS-NEXT:    call void @sendmsg_is_norecurse()
+; FNATTRS-NEXT:    call void @sendmsghalt_is_norecurse()
+; FNATTRS-NEXT:    call void @sendmsg_rtn_is_norecurse()
+; FNATTRS-NEXT:    ret void
+;
+; ATTRIBUTOR: Function Attrs: nounwind
+; ATTRIBUTOR-LABEL: define void @user(
+; ATTRIBUTOR-SAME: ) #[[ATTR3:[0-9]+]] {
+; ATTRIBUTOR-NEXT:    call void @sendmsg_is_norecurse() #[[ATTR8:[0-9]+]]
+; ATTRIBUTOR-NEXT:    call void @sendmsghalt_is_norecurse() #[[ATTR3]]
+; ATTRIBUTOR-NEXT:    call void @sendmsg_rtn_is_norecurse() #[[ATTR3]]
+; ATTRIBUTOR-NEXT:    ret void
+;
+  call void @sendmsg_is_norecurse()
+  call void @sendmsghalt_is_norecurse()
+  call void @sendmsg_rtn_is_norecurse()
+  ret void
+}
+;.
----------------
arsenm wrote:

Yes, update_test_checks adds this when checking the attribute groups for some reason 

https://github.com/llvm/llvm-project/pull/126782