[llvm] AMDGPU: Propagate amdgpu-max-num-workgroups attribute (PR #113018)

[Shilei Tian via llvm-commits]

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@@ -0,0 +1,228 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-attributes --check-globals all --version 5
+; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -passes=amdgpu-attributor %s | FileCheck %s
+
+; External call to avoid inferring argument attributes. This makes the
+; final attribute groups easier to read
+declare void @dummy()
+
+define void @extern_callee() {
+; CHECK-LABEL: define void @extern_callee(
+; CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
+; CHECK-NEXT:    call void @dummy()
+; CHECK-NEXT:    ret void
+;
+  call void @dummy()
+  ret void
+}
+
+define internal void @callee_1_2_3() {
+; CHECK-LABEL: define internal void @callee_1_2_3(
+; CHECK-SAME: ) #[[ATTR1:[0-9]+]] {
+; CHECK-NEXT:    call void @dummy()
+; CHECK-NEXT:    ret void
+;
+  call void @dummy()
+  ret void
+}
+
+define amdgpu_kernel void @kernel_1_2_3() #0 {
+; CHECK-LABEL: define amdgpu_kernel void @kernel_1_2_3(
+; CHECK-SAME: ) #[[ATTR1]] {
+; CHECK-NEXT:    call void @callee_1_2_3()
+; CHECK-NEXT:    call void @extern_callee()
+; CHECK-NEXT:    call void @dummy()
+; CHECK-NEXT:    ret void
+;
+  call void @callee_1_2_3()
+  call void @extern_callee()
+  call void @dummy()
+  ret void
+}
+
+attributes #0 = {"amdgpu-max-num-workgroups"="1,2,3"}
+
+; -> 100,10,99
+define internal void @callee_merge_100_8_32__16_10_99() {
+; CHECK-LABEL: define internal void @callee_merge_100_8_32__16_10_99(
+; CHECK-SAME: ) #[[ATTR2:[0-9]+]] {
+; CHECK-NEXT:    call void @dummy()
+; CHECK-NEXT:    ret void
+;
+  call void @dummy()
+  ret void
+}
+
+define amdgpu_kernel void @kernel_100_8_32() #1 {
+; CHECK-LABEL: define amdgpu_kernel void @kernel_100_8_32(
+; CHECK-SAME: ) #[[ATTR3:[0-9]+]] {
+; CHECK-NEXT:    call void @callee_merge_100_8_32__16_10_99()
+; CHECK-NEXT:    ret void
+;
+  call void @callee_merge_100_8_32__16_10_99()
+  ret void
+}
+
+attributes #1 = {"amdgpu-max-num-workgroups"="100,8,32"}
+
+define amdgpu_kernel void @kernel_16_10_99() #2 {
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shiltian wrote:

probably need to check all entry CC

https://github.com/llvm/llvm-project/pull/113018