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; RUN: llc -O0 -mtriple=spirv-unknown-unknown %s -o - | FileCheck %s
; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-unknown %s -o - -filetype=obj | spirv-val %}
define spir_func noundef i32 @test_branch(i32 noundef %X) {
entry:
; CHECK-LABEL: ; -- Begin function test_branch
; OpSelectionMerge %[[#]] DontFlatten
%X.addr = alloca i32, align 4
%resp = alloca i32, align 4
store i32 %X, ptr %X.addr, align 4
%0 = load i32, ptr %X.addr, align 4
%cmp = icmp sgt i32 %0, 0
br i1 %cmp, label %if.then, label %if.else, !hlsl.controlflow.hint !0
if.then: ; preds = %entry
%1 = load i32, ptr %X.addr, align 4
%sub = sub nsw i32 0, %1
store i32 %sub, ptr %resp, align 4
br label %if.end
if.else: ; preds = %entry
%2 = load i32, ptr %X.addr, align 4
%mul = mul nsw i32 %2, 2
store i32 %mul, ptr %resp, align 4
br label %if.end
if.end: ; preds = %if.else, %if.then
%3 = load i32, ptr %resp, align 4
ret i32 %3
}
define spir_func noundef i32 @test_flatten(i32 noundef %X) {
entry:
; CHECK-LABEL: ; -- Begin function test_flatten
; OpSelectionMerge %[[#]] Flatten
%X.addr = alloca i32, align 4
%resp = alloca i32, align 4
store i32 %X, ptr %X.addr, align 4
%0 = load i32, ptr %X.addr, align 4
%cmp = icmp sgt i32 %0, 0
br i1 %cmp, label %if.then, label %if.else, !hlsl.controlflow.hint !1
if.then: ; preds = %entry
%1 = load i32, ptr %X.addr, align 4
%sub = sub nsw i32 0, %1
store i32 %sub, ptr %resp, align 4
br label %if.end
if.else: ; preds = %entry
%2 = load i32, ptr %X.addr, align 4
%mul = mul nsw i32 %2, 2
store i32 %mul, ptr %resp, align 4
br label %if.end
if.end: ; preds = %if.else, %if.then
%3 = load i32, ptr %resp, align 4
ret i32 %3
}
define spir_func noundef i32 @test_no_attr(i32 noundef %X) {
entry:
; CHECK-LABEL: ; -- Begin function test_no_attr
; OpSelectionMerge %[[#]] None
%X.addr = alloca i32, align 4
%resp = alloca i32, align 4
store i32 %X, ptr %X.addr, align 4
%0 = load i32, ptr %X.addr, align 4
%cmp = icmp sgt i32 %0, 0
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
%1 = load i32, ptr %X.addr, align 4
%sub = sub nsw i32 0, %1
store i32 %sub, ptr %resp, align 4
br label %if.end
if.else: ; preds = %entry
%2 = load i32, ptr %X.addr, align 4
%mul = mul nsw i32 %2, 2
store i32 %mul, ptr %resp, align 4
br label %if.end
if.end: ; preds = %if.else, %if.then
%3 = load i32, ptr %resp, align 4
ret i32 %3
}
!0 = !{!"hlsl.controlflow.hint", i32 1}
!1 = !{!"hlsl.controlflow.hint", i32 2}
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