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TheRock/compiler/amd-llvm/llvm/test/CodeGen/AMDGPU/endcf-loop-header.ll
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2026-09-02 16:34:47 -07:00

40 lines
1.0 KiB
LLVM

; RUN: llc < %s -mtriple=amdgcn | FileCheck %s
; This tests that the llvm.SI.end.cf intrinsic is not inserted into the
; loop block. This intrinsic will be lowered to s_or_b64 by the code
; generator.
; CHECK-LABEL: {{^}}test:
; This is was lowered from the llvm.SI.end.cf intrinsic:
; CHECK: s_or_b64 exec, exec
; CHECK: [[LOOP_LABEL:.L[0-9A-Za-z_]+]]: ; %loop{{$}}
; CHECK-NOT: s_or_b64 exec, exec
; CHECK: s_cbranch_execnz [[LOOP_LABEL]]
define amdgpu_kernel void @test(ptr addrspace(1) %out) {
entry:
%cond = call i32 @llvm.amdgcn.workitem.id.x() #0
%tmp0 = icmp eq i32 %cond, 0
br i1 %tmp0, label %if, label %loop
if:
store i32 0, ptr addrspace(1) %out
br label %loop
loop:
%tmp1 = phi i32 [0, %entry], [0, %if], [%inc, %loop]
%inc = add i32 %tmp1, %cond
%tmp2 = icmp ugt i32 %inc, 10
br i1 %tmp2, label %done, label %loop
done:
%tmp3 = getelementptr i32, ptr addrspace(1) %out, i64 1
store i32 %inc, ptr addrspace(1) %tmp3
ret void
}
declare i32 @llvm.amdgcn.workitem.id.x() #0
attributes #0 = { nounwind readnone }