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02050986d9
to add/sub by doing the normal operation and then checking for overflow afterwards. This generally relies on the DAG handling the later invalid operations as well. Fixes the 64-bit part of rdar://8622122 and rdar://8774702. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123908 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
756 B
LLVM
29 lines
756 B
LLVM
; RUN: llc < %s -mtriple=i386-apple-darwin
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%0 = type { i64, i1 }
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define i32 @f0(i64 %a, i64 %b) nounwind ssp {
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%1 = alloca i64, align 4
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%2 = alloca i64, align 4
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store i64 %a, i64* %1, align 8
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store i64 %b, i64* %2, align 8
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%3 = load i64* %1, align 8
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%4 = load i64* %2, align 8
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%5 = call %0 @llvm.smul.with.overflow.i64(i64 %3, i64 %4)
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%6 = extractvalue %0 %5, 0
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%7 = extractvalue %0 %5, 1
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br i1 %7, label %8, label %9
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; <label>:8 ; preds = %0
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call void @llvm.trap()
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unreachable
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; <label>:9 ; preds = %0
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%10 = trunc i64 %6 to i32
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ret i32 %10
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}
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declare %0 @llvm.smul.with.overflow.i64(i64, i64) nounwind readnone
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declare void @llvm.trap() nounwind
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