1; RUN: llc -mtriple=spirv-unknown-vulkan-compute -O0 %s -o - | FileCheck %s --match-full-lines 2; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-vulkan-compute %s -o - -filetype=obj | spirv-val %} 3 4target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-G1" 5target triple = "spirv-unknown-vulkan1.3-compute" 6 7define spir_func noundef i32 @_Z3foov() #0 { 8entry: 9 %0 = call token @llvm.experimental.convergence.entry() 10 ret i32 1 11} 12 13define internal spir_func void @main() #2 { 14; CHECK: %[[#entry:]] = OpLabel 15; CHECK: OpBranch %[[#do_header:]] 16entry: 17 %0 = call token @llvm.experimental.convergence.entry() 18 %var = alloca i32, align 4 19 br label %do_header 20 21; Here a the loop header had to be split in two: 22; - 1 header for the loop 23; - 1 header for the condition. 24 25; CHECK: %[[#do_header:]] = OpLabel 26; CHECK: OpLoopMerge %[[#do_merge:]] %[[#do_latch:]] None 27; CHECK: OpBranch %[[#new_header:]] 28 29; CHECK: %[[#new_header]] = OpLabel 30; CHECK: OpSelectionMerge %[[#if_merge:]] None 31; CHECK: OpBranchConditional %[[#]] %[[#if_then:]] %[[#if_end:]] 32do_header: 33 %1 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %0) ] 34 store i32 0, ptr %var 35 br i1 true, label %if.then, label %if.end 36 37; CHECK: %[[#if_end]] = OpLabel 38; CHECK: OpBranch %[[#if_merge]] 39if.end: 40 store i32 0, ptr %var 41 br label %do_latch 42 43; CHECK: %[[#if_then]] = OpLabel 44; CHECK: OpBranch %[[#if_merge]] 45if.then: 46 store i32 0, ptr %var 47 br label %do_latch 48 49; CHECK: %[[#if_merge]] = OpLabel 50; CHECK: OpBranchConditional %[[#]] %[[#do_latch]] %[[#do_merge]] 51 52; CHECK: %[[#do_merge]] = OpLabel 53; CHECK: OpBranch %[[#do2_header:]] 54do.end: 55 store i32 0, ptr %var 56 br label %do2_header 57 58; CHECK: %[[#do2_header]] = OpLabel 59; CHECK: OpLoopMerge %[[#do2_merge:]] %[[#do2_continue:]] None 60; CHECK: OpBranch %[[#do3_header:]] 61do2_header: 62 %6 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %0) ] 63 store i32 0, ptr %var 64 br label %do3_header 65 66; CHECK: %[[#do3_header]] = OpLabel 67; CHECK: OpLoopMerge %[[#do3_merge:]] %[[#do3_continue:]] None 68; CHECK: OpBranch %[[#do3_body:]] 69do3_header: 70 %8 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %6) ] 71 store i32 0, ptr %var 72 br label %do3_continue 73 74; CHECK: %[[#do3_body]] = OpLabel 75; CHECK: OpBranchConditional %[[#]] %[[#do3_continue]] %[[#do3_merge]] 76 77; CHECK: %[[#do3_merge]] = OpLabel 78; CHECK: OpBranch %[[#do2_new_latch:]] 79do3_merge: 80 store i32 0, ptr %var 81 br label %do2_continue 82 83; CHECK: %[[#do2_new_latch]] = OpLabel 84; CHECK: OpBranchConditional %[[#]] %[[#do2_continue]] %[[#do2_merge]] 85 86; CHECK: %[[#do2_merge]] = OpLabel 87; CHECK: OpReturn 88do2_merge: 89 ret void 90 91; CHECK: %[[#do2_continue]] = OpLabel 92; CHECK: OpBranch %[[#do2_header]] 93do2_continue: 94 store i32 0, ptr %var 95 br i1 true, label %do2_header, label %do2_merge 96 97; CHECK: %[[#do3_continue]] = OpLabel 98; CHECK: OpBranch %[[#do3_header]] 99do3_continue: 100 store i32 0, ptr %var 101 br i1 true, label %do3_header, label %do3_merge 102 103; CHECK: %[[#do_latch]] = OpLabel 104; CHECK: OpBranch %[[#do_header]] 105do_latch: 106 store i32 0, ptr %var 107 br i1 true, label %do_header, label %do.end 108} 109 110declare token @llvm.experimental.convergence.entry() #1 111declare token @llvm.experimental.convergence.loop() #1 112 113attributes #0 = { convergent noinline nounwind optnone "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 114attributes #1 = { convergent nocallback nofree nosync nounwind willreturn memory(none) } 115attributes #2 = { convergent noinline norecurse nounwind optnone "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 116attributes #3 = { convergent norecurse "frame-pointer"="all" "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 117 118!llvm.module.flags = !{!0, !1, !2} 119 120!0 = !{i32 1, !"wchar_size", i32 4} 121!1 = !{i32 4, !"dx.disable_optimizations", i32 1} 122!2 = !{i32 7, !"frame-pointer", i32 2} 123