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60 lines
1.7 KiB
LLVM
60 lines
1.7 KiB
LLVM
; RUN: llc < %s -mtriple=i686-linux | FileCheck %s
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@ok = internal constant [4 x i8] c"%d\0A\00"
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@no = internal constant [4 x i8] c"no\0A\00"
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define i1 @func1(i32 %v1, i32 %v2) nounwind {
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entry:
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%t = call {i32, i1} @llvm.ssub.with.overflow.i32(i32 %v1, i32 %v2)
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%sum = extractvalue {i32, i1} %t, 0
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%obit = extractvalue {i32, i1} %t, 1
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br i1 %obit, label %overflow, label %normal
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normal:
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%t1 = tail call i32 (i8*, ...) @printf( i8* getelementptr ([4 x i8], [4 x i8]* @ok, i32 0, i32 0), i32 %sum ) nounwind
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ret i1 true
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overflow:
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%t2 = tail call i32 (i8*, ...) @printf( i8* getelementptr ([4 x i8], [4 x i8]* @no, i32 0, i32 0) ) nounwind
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ret i1 false
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; CHECK-LABEL: func1:
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; CHECK: subl 20(%esp)
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; CHECK-NEXT: jno
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}
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define i1 @func2(i32 %v1, i32 %v2) nounwind {
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entry:
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%t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %v1, i32 %v2)
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%sum = extractvalue {i32, i1} %t, 0
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%obit = extractvalue {i32, i1} %t, 1
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br i1 %obit, label %carry, label %normal
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normal:
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%t1 = tail call i32 (i8*, ...) @printf( i8* getelementptr ([4 x i8], [4 x i8]* @ok, i32 0, i32 0), i32 %sum ) nounwind
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ret i1 true
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carry:
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%t2 = tail call i32 (i8*, ...) @printf( i8* getelementptr ([4 x i8], [4 x i8]* @no, i32 0, i32 0) ) nounwind
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ret i1 false
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; CHECK-LABEL: func2:
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; CHECK: subl 20(%esp)
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; CHECK-NEXT: jae
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}
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declare i32 @printf(i8*, ...) nounwind
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declare {i32, i1} @llvm.ssub.with.overflow.i32(i32, i32)
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declare {i32, i1} @llvm.usub.with.overflow.i32(i32, i32)
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define i1 @func3(i32 %x) nounwind {
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entry:
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%t = call {i32, i1} @llvm.ssub.with.overflow.i32(i32 %x, i32 1)
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%obit = extractvalue {i32, i1} %t, 1
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ret i1 %obit
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; CHECK-LABEL: func3:
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; CHECK: decl
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; CHECK-NEXT: seto
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}
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