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; RUN: llvm-as < %s -o %t.bc
; RUN: llvm-spirv %t.bc -o %t.spv --spirv-ext=+SPV_INTEL_variable_length_array
; RUN: llvm-spirv %t.spv -to-text -o - | FileCheck %s --check-prefix=CHECK-SPIRV
; RUN: llvm-spirv -r %t.spv -o %t.rev.bc
; RUN: llvm-dis %t.rev.bc -o - | FileCheck %s --check-prefix=CHECK-LLVM
; The IR was generated for the following C code:
; int foo(long a, long b) {
; int qqq[42];
; int t = 0;
; {
; int arr[a];
; t = arr[b];
; }
; int brr[a];
; return t + qqq[b] + brr[b];
; }
; Command: clang example.c -emit-llvm -O1 -g0 -fno-discard-value-names
; Target triple and datalayout was changed manually.
; CHECK-SPIRV: Capability VariableLengthArrayINTEL
; CHECK-SPIRV: Extension "SPV_INTEL_variable_length_array"
; CHECK-SPIRV-DAG: TypeInt [[#Int:]] 32 0
; CHECK-SPIRV-DAG: TypeInt [[#Char:]] 8 0
; CHECK-SPIRV-DAG: TypePointer [[#CharPtr:]] [[#]] [[#Char]]
; CHECK-SPIRV-DAG: TypePointer [[#IntPtr:]] [[#]] [[#Int]]
; CHECK-SPIRV: FunctionParameter [[#]] [[#A:]]
; CHECK-SPIRV: SaveMemoryINTEL [[#CharPtr]] [[#SavedMem:]]
; CHECK-SPIRV: VariableLengthArrayINTEL [[#IntPtr]] [[#]] [[#A]]
; CHECK-SPIRV: RestoreMemoryINTEL [[#SavedMem]]
; CHECK-SPIRV: SaveMemoryINTEL [[#CharPtr]] [[#SavedMem:]]
; CHECK-SPIRV: VariableLengthArrayINTEL [[#IntPtr]] [[#]] [[#A]]
; CHECK-SPIRV: RestoreMemoryINTEL [[#SavedMem]]
target datalayout = "e-p:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024"
target triple = "spir"
define dso_local spir_func i32 @foo(i64 %a, i64 %b) local_unnamed_addr #0 {
entry:
%qqq = alloca [42 x i32], align 16
%0 = bitcast [42 x i32]* %qqq to i8*
call void @llvm.lifetime.start.p0i8(i64 168, i8* nonnull %0) #2
; CHECK-LLVM: %[[#SavedMem:]] = call i8* @llvm.stacksave()
%1 = call i8* @llvm.stacksave()
; CHECK-LLVM: alloca i32, i64 %a, align 16
%vla = alloca i32, i64 %a, align 16
%arrayidx = getelementptr inbounds i32, i32* %vla, i64 %b
%2 = load i32, i32* %arrayidx, align 4
; CHECK-LLVM: call void @llvm.stackrestore(i8* %[[#SavedMem]])
call void @llvm.stackrestore(i8* %1)
; CHECK-LLVM: %[[#SavedMem:]] = call i8* @llvm.stacksave()
%3 = call i8* @llvm.stacksave()
; CHECK-LLVM: alloca i32, i64 %a, align 16
%vla2 = alloca i32, i64 %a, align 16
%arrayidx3 = getelementptr inbounds [42 x i32], [42 x i32]* %qqq, i64 0, i64 %b
%4 = load i32, i32* %arrayidx3, align 4
%add = add nsw i32 %4, %2
%arrayidx4 = getelementptr inbounds i32, i32* %vla2, i64 %b
%5 = load i32, i32* %arrayidx4, align 4
%add5 = add nsw i32 %add, %5
; CHECK-LLVM: call void @llvm.stackrestore(i8* %[[#SavedMem]])
call void @llvm.stackrestore(i8* %3)
call void @llvm.lifetime.end.p0i8(i64 168, i8* nonnull %0) #2
ret i32 %add5
}
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
declare i8* @llvm.stacksave() #2
declare void @llvm.stackrestore(i8*) #2
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { argmemonly nounwind willreturn }
attributes #2 = { nounwind }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project.git 5804a8b1228ba890d48f4085a3a192ef83c73e00)"}
|
