mirror of
https://github.com/c64scene-ar/llvm-6502.git
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268637ed0f
expansion is the same as that used by LegalizeDAG. The resulting code sucks in terms of performance/codesize on x86-32 for a 64-bit operation; I haven't looked into whether different expansions might be better in general. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105378 91177308-0d34-0410-b5e6-96231b3b80d8
43 lines
1.4 KiB
LLVM
43 lines
1.4 KiB
LLVM
; RUN: llc < %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(i128 signext %v1, i128 signext %v2) nounwind {
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entry:
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%t = call {i128, i1} @llvm.sadd.with.overflow.i128(i128 %v1, i128 %v2)
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%sum = extractvalue {i128, i1} %t, 0
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%sum32 = trunc i128 %sum to i32
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%obit = extractvalue {i128, 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 %sum32 ) 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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}
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define i1 @func2(i128 zeroext %v1, i128 zeroext %v2) nounwind {
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entry:
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%t = call {i128, i1} @llvm.uadd.with.overflow.i128(i128 %v1, i128 %v2)
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%sum = extractvalue {i128, i1} %t, 0
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%sum32 = trunc i128 %sum to i32
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%obit = extractvalue {i128, 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]* @ok, i32 0, i32 0), i32 %sum32 ) 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]* @no, i32 0, i32 0) ) nounwind
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ret i1 false
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}
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declare i32 @printf(i8*, ...) nounwind
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declare {i128, i1} @llvm.sadd.with.overflow.i128(i128, i128)
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declare {i128, i1} @llvm.uadd.with.overflow.i128(i128, i128)
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