[clang] [llvm] [AMDGPU][Clang] Allow amdgpu-waves-per-eu attribute to lower target occupancy range (PR #138284)

[Matt Arsenault via llvm-commits]

================
@@ -0,0 +1,40 @@
+; RUN: not llvm-as -disable-output %s 2>&1 | FileCheck %s
+
+target triple = "amdgcn-amd-amdhsa"
+
+define void @valid_amdgpu_waves_per_eu_range() "amdgpu-waves-per-eu"="2,4" {
+  ret void
+}
+
+define void @valid_amdgpu_waves_per_eu_min_only() "amdgpu-waves-per-eu"="2" {
+  ret void
+}
+
+define void @valid_amdgpu_waves_per_eu_max_only() "amdgpu-waves-per-eu"="0,4" {
+  ret void
+}
+
+; CHECK: minimum for 'amdgpu-waves-per-eu' must be integer: x
+define void @invalid_amdgpu_waves_per_eu_min_nan() "amdgpu-waves-per-eu"="x" {
+  ret void
+}
+
+; CHECK: maximum for 'amdgpu-waves-per-eu' must be integer: x
+define void @invalid_amdgpu_waves_per_eu_max_nan() "amdgpu-waves-per-eu"="0,x" {
+  ret void
+}
+
+; CHECK: minimum for 'amdgpu-waves-per-eu' must be non-zero when maximum is not provided
+define void @invalid_amdgpu_waves_per_eu_min_zero() "amdgpu-waves-per-eu"="0" {
+  ret void
+}
+
+; CHECK: maximum for 'amdgpu-waves-per-eu' must be non-zero
+define void @invalid_amdgpu_waves_per_eu_max_zero() "amdgpu-waves-per-eu"="2,0" {
+  ret void
+}
+
+; CHECK: minimum must be less than or equal to maximum for 'amdgpu-waves-per-eu': 2 > 1
+define void @invalid_amdgpu_waves_per_eu_max_lt_min() "amdgpu-waves-per-eu"="2,1" {
+  ret void
+}
----------------
arsenm wrote:

Test negative number 

https://github.com/llvm/llvm-project/pull/138284