TheRock/compiler/spirv-llvm-translator/test/transcoding/OpSwitch32.ll

;__kernel void test_32(__global int* res)
;{
;	int tid = get_global_id(0);
;
;	switch(tid)
;	{
;	case 0:
;		res[tid] = 1;
;		break;
;	case 1:
;		res[tid] = 2;
;		break;
;	}
;}
; bash$ clang -cc1 -triple spir64-unknown-unknown -x cl -cl-std=CL2.0 -O0 -include opencl.h -emit-llvm OpSwitch.cl -o test_32.ll

; RUN: llvm-as %s -o %t.bc
; RUN: llvm-spirv %t.bc -spirv-text -o %t.spt
; RUN: FileCheck < %t.spt %s --check-prefix=CHECK-SPIRV
; RUN: llvm-spirv %t.bc -o %t.spv
; RUN: spirv-val %t.spv
; RUN: llvm-spirv -r %t.spv -o %t.bc
; RUN: llvm-dis < %t.bc | FileCheck %s --check-prefix=CHECK-LLVM
; RUN: %if spirv-backend %{ llc -O0 -mtriple=spirv64-unknown-unknown -filetype=obj %s -o %t.llc.spv %}
; RUN: %if spirv-backend %{ llvm-spirv -r %t.llc.spv -o %t.llc.rev.bc %}
; RUN: %if spirv-backend %{ llvm-dis %t.llc.rev.bc -o %t.llc.rev.ll %}
; RUN: %if spirv-backend %{ FileCheck %s --check-prefix=CHECK-LLC < %t.llc.rev.ll %}

; CHECK-SPIRV: 7 Switch {{[0-9]+}} {{[0-9]+}} 0 {{[0-9]+}} 1 {{[0-9]+}}

; ModuleID = 'main'
target datalayout = "e-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-n8:16:32:64"
target triple = "spir64-unknown-unknown"

;CHECK-LLVM: test_32
;CHECK-LLVM: entry
;CHECK-LLVM: switch i32 %[[#]], label %sw.epilog
;CHECK-LLVM: i32 0, label %sw.bb
;CHECK-LLVM: i32 1, label %sw.bb1

; CHECK-LLC-LABEL: define spir_kernel void @test_32(
; CHECK-LLC: entry:
; CHECK-LLC: switch i32 %{{.*}}, label %sw.epilog [
; CHECK-LLC-NEXT: i32 0, label %sw.bb
; CHECK-LLC-NEXT: i32 1, label %sw.bb1

; Function Attrs: nounwind
define spir_kernel void @test_32(ptr addrspace(1) %res) #0 !kernel_arg_addr_space !1 !kernel_arg_access_qual !2 !kernel_arg_type !3 !kernel_arg_base_type !4 !kernel_arg_type_qual !5 {
entry:
  %res.addr = alloca ptr addrspace(1), align 8
  %tid = alloca i32, align 4
  store ptr addrspace(1) %res, ptr %res.addr, align 8
  %call = call spir_func i64 @_Z13get_global_idj(i32 0) #2
  %conv = trunc i64 %call to i32
  store i32 %conv, ptr %tid, align 4
  %0 = load i32, ptr %tid, align 4
  switch i32 %0, label %sw.epilog [
    i32 0, label %sw.bb
    i32 1, label %sw.bb1
  ]

;CHECK-LLVM: sw.bb
;CHECK-LLVM: preds = %entry
sw.bb:                                            ; preds = %entry
  %1 = load i32, ptr %tid, align 4
  %idxprom = sext i32 %1 to i64
  %2 = load ptr addrspace(1), ptr %res.addr, align 8
  %arrayidx = getelementptr inbounds i32, ptr addrspace(1) %2, i64 %idxprom
  store i32 1, ptr addrspace(1) %arrayidx, align 4
  br label %sw.epilog

;CHECK-LLVM: sw.bb1
;CHECK-LLVM: preds = %entry
sw.bb1:                                           ; preds = %entry
  %3 = load i32, ptr %tid, align 4
  %idxprom2 = sext i32 %3 to i64
  %4 = load ptr addrspace(1), ptr %res.addr, align 8
  %arrayidx3 = getelementptr inbounds i32, ptr addrspace(1) %4, i64 %idxprom2
  store i32 2, ptr addrspace(1) %arrayidx3, align 4
  br label %sw.epilog

;CHECK-LLVM: sw.epilog
;CHECK-LLVM: preds = %sw.bb1, %sw.bb, %entry
sw.epilog:                                        ; preds = %entry, %sw.bb1, %sw.bb
  ret void
}

; In the llc roundtrip, blocks are reordered: sw.bb1 before sw.bb
; CHECK-LLC-LABEL: sw.bb1:
; CHECK-LLC: store i32 2, ptr addrspace(1) %{{.*}}, align 4
; CHECK-LLC: br label %sw.epilog

; CHECK-LLC-LABEL: sw.bb:
; CHECK-LLC: store i32 1, ptr addrspace(1) %{{.*}}, align 4
; CHECK-LLC: br label %sw.epilog

; CHECK-LLC-LABEL: sw.epilog:
; CHECK-LLC: ret void

; Function Attrs: nounwind
declare spir_func i64 @_Z13get_global_idj(i32) #1

attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind }

!opencl.enable.FP_CONTRACT = !{}
!opencl.spir.version = !{!6}
!opencl.ocl.version = !{!7}
!opencl.used.extensions = !{!8}
!opencl.used.optional.core.features = !{!8}
!opencl.compiler.options = !{!8}
!llvm.ident = !{!9}

!1 = !{i32 1}
!2 = !{!"none"}
!3 = !{!"int*"}
!4 = !{!"int*"}
!5 = !{!""}
!6 = !{i32 1, i32 2}
!7 = !{i32 2, i32 0}
!8 = !{}
!9 = !{!"clang version 3.6.1"}