| ; RUN: opt -mtriple amdgcn-unknown-amdhsa -passes='print<divergence>' -disable-output %s 2>&1 | FileCheck %s |
| |
| ; CHECK-LABEL: for function 'readfirstlane': |
| define amdgpu_kernel void @readfirstlane() { |
| %id.x = call i32 @llvm.amdgcn.workitem.id.x() |
| ; CHECK: DIVERGENT: %id.x = call i32 @llvm.amdgcn.workitem.id.x() |
| %first.lane = call i32 @llvm.amdgcn.readfirstlane(i32 %id.x) |
| ; CHECK-NOT: DIVERGENT: %first.lane = call i32 @llvm.amdgcn.readfirstlane(i32 %id.x) |
| ret void |
| } |
| |
| ; CHECK-LABEL: for function 'icmp': |
| define amdgpu_kernel void @icmp(i32 inreg %x) { |
| ; CHECK-NOT: DIVERGENT: %icmp = call i64 @llvm.amdgcn.icmp.i32 |
| %icmp = call i64 @llvm.amdgcn.icmp.i32(i32 %x, i32 0, i32 33) |
| ret void |
| } |
| |
| ; CHECK-LABEL: for function 'fcmp': |
| define amdgpu_kernel void @fcmp(float inreg %x, float inreg %y) { |
| ; CHECK-NOT: DIVERGENT: %fcmp = call i64 @llvm.amdgcn.fcmp.i32 |
| %fcmp = call i64 @llvm.amdgcn.fcmp.i32(float %x, float %y, i32 33) |
| ret void |
| } |
| |
| ; CHECK-LABEL: for function 'ballot': |
| define amdgpu_kernel void @ballot(i1 inreg %x) { |
| ; CHECK-NOT: DIVERGENT: %ballot = call i64 @llvm.amdgcn.ballot.i32 |
| %ballot = call i64 @llvm.amdgcn.ballot.i32(i1 %x) |
| ret void |
| } |
| |
| ; SGPR asm outputs are uniform regardless of the input operands. |
| ; CHECK-LABEL: for function 'asm_sgpr': |
| ; CHECK: DIVERGENT: i32 %divergent |
| ; CHECK-NOT: DIVERGENT |
| define i32 @asm_sgpr(i32 %divergent) { |
| %sgpr = call i32 asm "; def $0, $1","=s,v"(i32 %divergent) |
| ret i32 %sgpr |
| } |
| |
| ; CHECK-LABEL: Divergence Analysis' for function 'asm_mixed_sgpr_vgpr': |
| ; CHECK: DIVERGENT: %asm = call { i32, i32 } asm "; def $0, $1, $2", "=s,=v,v"(i32 %divergent) |
| ; CHECK-NEXT: {{^[ \t]+}}%sgpr = extractvalue { i32, i32 } %asm, 0 |
| ; CHECK-NEXT: DIVERGENT: %vgpr = extractvalue { i32, i32 } %asm, 1 |
| define void @asm_mixed_sgpr_vgpr(i32 %divergent) { |
| %asm = call { i32, i32 } asm "; def $0, $1, $2","=s,=v,v"(i32 %divergent) |
| %sgpr = extractvalue { i32, i32 } %asm, 0 |
| %vgpr = extractvalue { i32, i32 } %asm, 1 |
| store i32 %sgpr, i32 addrspace(1)* undef |
| store i32 %vgpr, i32 addrspace(1)* undef |
| ret void |
| } |
| |
| declare i32 @llvm.amdgcn.workitem.id.x() #0 |
| declare i32 @llvm.amdgcn.readfirstlane(i32) #0 |
| declare i64 @llvm.amdgcn.icmp.i32(i32, i32, i32) #1 |
| declare i64 @llvm.amdgcn.fcmp.i32(float, float, i32) #1 |
| declare i64 @llvm.amdgcn.ballot.i32(i1) #1 |
| |
| attributes #0 = { nounwind readnone } |
| attributes #1 = { nounwind readnone convergent } |