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48da0be8b5
the add/sub case since in the case of multiplication you also have to check that the operation in the larger type did not overflow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165017 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.3 KiB
LLVM
84 lines
2.3 KiB
LLVM
; RUN: llc < %s -march=x86 | 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 @test1(i32 %v1, i32 %v2) nounwind {
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entry:
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%t = call {i32, i1} @llvm.smul.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]* @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]* @no, i32 0, i32 0) ) nounwind
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ret i1 false
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; CHECK: test1:
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; CHECK: imull
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; CHECK-NEXT: jno
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}
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define i1 @test2(i32 %v1, i32 %v2) nounwind {
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entry:
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%t = call {i32, i1} @llvm.smul.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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overflow:
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%t2 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @no, i32 0, i32 0) ) nounwind
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ret i1 false
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normal:
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%t1 = tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @ok, i32 0, i32 0), i32 %sum ) nounwind
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ret i1 true
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; CHECK: test2:
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; CHECK: imull
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; CHECK-NEXT: jno
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}
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declare i32 @printf(i8*, ...) nounwind
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declare {i32, i1} @llvm.smul.with.overflow.i32(i32, i32)
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define i32 @test3(i32 %a, i32 %b) nounwind readnone {
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entry:
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%tmp0 = add i32 %b, %a
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%tmp1 = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %tmp0, i32 2)
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%tmp2 = extractvalue { i32, i1 } %tmp1, 0
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ret i32 %tmp2
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; CHECK: test3:
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; CHECK: addl
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; CHECK-NEXT: addl
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; CHECK-NEXT: ret
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}
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define i32 @test4(i32 %a, i32 %b) nounwind readnone {
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entry:
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%tmp0 = add i32 %b, %a
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%tmp1 = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %tmp0, i32 4)
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%tmp2 = extractvalue { i32, i1 } %tmp1, 0
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ret i32 %tmp2
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; CHECK: test4:
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; CHECK: addl
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; CHECK: mull
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; CHECK-NEXT: ret
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}
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declare { i63, i1 } @llvm.smul.with.overflow.i63(i63, i63) nounwind readnone
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define i1 @test5() nounwind {
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entry:
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%res = call { i63, i1 } @llvm.smul.with.overflow.i63(i63 4, i63 4611686018427387903)
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%sum = extractvalue { i63, i1 } %res, 0
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%overflow = extractvalue { i63, i1 } %res, 1
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ret i1 %overflow
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; Was returning false, should return true (not constant folded yet though).
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; PR13991
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; CHECK: test5:
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; CHECK-NOT: xorb
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}
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