; RUN: llc -mtriple=spirv-unknown-vulkan-compute -O0 %s -o - | FileCheck %s
; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-vulkan-compute %s -o - -filetype=obj | spirv-val %}
;
; [numthreads(1, 1, 1)]
; void main() {
; int a, b;
; int cond = 1;
;
; while(cond) {
; switch(b) {
; default:
; if (cond) {
; if (cond)
; return;
; else
; return;
; }
; }
; return;
; }
; }
; CHECK: %[[#func_8:]] = OpFunction %[[#void:]] DontInline %[[#]]
; CHECK: %[[#bb22:]] = OpLabel
; CHECK: OpBranch %[[#bb23:]]
; CHECK: %[[#bb23:]] = OpLabel
; CHECK: OpSelectionMerge %[[#bb24:]] None
; CHECK: OpBranchConditional %[[#]] %[[#bb25:]] %[[#bb24:]]
; CHECK: %[[#bb25:]] = OpLabel
; CHECK: OpBranch %[[#bb26:]]
; CHECK: %[[#bb26:]] = OpLabel
; CHECK: OpSelectionMerge %[[#bb27:]] None
; CHECK: OpBranchConditional %[[#]] %[[#bb27:]] %[[#bb28:]]
; CHECK: %[[#bb28:]] = OpLabel
; CHECK: OpBranch %[[#bb27:]]
; CHECK: %[[#bb27:]] = OpLabel
; CHECK: OpBranchConditional %[[#]] %[[#bb29:]] %[[#bb24:]]
; CHECK: %[[#bb29:]] = OpLabel
; CHECK: OpSelectionMerge %[[#bb30:]] None
; CHECK: OpBranchConditional %[[#]] %[[#bb30:]] %[[#bb31:]]
; CHECK: %[[#bb31:]] = OpLabel
; CHECK: OpBranch %[[#bb30:]]
; CHECK: %[[#bb30:]] = OpLabel
; CHECK: OpBranch %[[#bb24:]]
; CHECK: %[[#bb24:]] = OpLabel
; CHECK: OpReturn
; CHECK: OpFunctionEnd
; CHECK: %[[#func_20:]] = OpFunction %[[#void:]] None %[[#]]
; CHECK: %[[#bb32:]] = OpLabel
; CHECK: OpReturn
; CHECK: OpFunctionEnd
target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-G1"
target triple = "spirv-unknown-vulkan1.3-compute"
; Function Attrs: convergent noinline norecurse nounwind optnone
define internal spir_func void @main() #0 {
entry:
%0 = call token @llvm.experimental.convergence.entry()
%a = alloca i32, align 4
%b = alloca i32, align 4
%cond = alloca i32, align 4
store i32 1, ptr %cond, align 4
br label %while.cond
while.cond: ; preds = %entry
%1 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %0) ]
%2 = load i32, ptr %cond, align 4
%tobool = icmp ne i32 %2, 0
br i1 %tobool, label %while.body, label %while.end
while.body: ; preds = %while.cond
%3 = load i32, ptr %b, align 4
switch i32 %3, label %sw.default [
]
sw.default: ; preds = %while.body
%4 = load i32, ptr %cond, align 4
%tobool1 = icmp ne i32 %4, 0
br i1 %tobool1, label %if.then, label %if.end
if.then: ; preds = %sw.default
%5 = load i32, ptr %cond, align 4
%tobool2 = icmp ne i32 %5, 0
br i1 %tobool2, label %if.then3, label %if.else
if.then3: ; preds = %if.then
br label %while.end
if.else: ; preds = %if.then
br label %while.end
if.end: ; preds = %sw.default
br label %sw.epilog
sw.epilog: ; preds = %if.end
br label %while.end
while.end: ; preds = %if.then3, %if.else, %sw.epilog, %while.cond
ret void
}
; Function Attrs: convergent norecurse
define void @main.1() #1 {
entry:
call void @main()
ret void
}
; Function Attrs: convergent nocallback nofree nosync nounwind willreturn memory(none)
declare token @llvm.experimental.convergence.entry() #2
; Function Attrs: convergent nocallback nofree nosync nounwind willreturn memory(none)
declare token @llvm.experimental.convergence.loop() #2
attributes #0 = { convergent noinline norecurse nounwind optnone "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
attributes #1 = { convergent norecurse "frame-pointer"="all" "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
attributes #2 = { convergent nocallback nofree nosync nounwind willreturn memory(none) }
!llvm.module.flags = !{!0, !1, !2}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 4, !"dx.disable_optimizations", i32 1}
!2 = !{i32 7, !"frame-pointer", i32 2}
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