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https://github.com/c64scene-ar/llvm-6502.git
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1fb0955cab
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134677 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.0 KiB
LLVM
48 lines
1.0 KiB
LLVM
; RUN: opt < %s -gvn -S | FileCheck %s
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;
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%0 = type { i64, i1 }
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define i64 @test1(i64 %a, i64 %b) nounwind ssp {
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entry:
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%uadd = tail call %0 @llvm.uadd.with.overflow.i64(i64 %a, i64 %b)
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%uadd.0 = extractvalue %0 %uadd, 0
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%add1 = add i64 %a, %b
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ret i64 %add1
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}
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; CHECK: @test1
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; CHECK-NOT: add1
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; CHECK: ret
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define i64 @test2(i64 %a, i64 %b) nounwind ssp {
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entry:
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%usub = tail call %0 @llvm.usub.with.overflow.i64(i64 %a, i64 %b)
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%usub.0 = extractvalue %0 %usub, 0
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%sub1 = sub i64 %a, %b
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ret i64 %sub1
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}
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; CHECK: @test2
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; CHECK-NOT: sub1
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; CHECK: ret
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define i64 @test3(i64 %a, i64 %b) nounwind ssp {
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entry:
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%umul = tail call %0 @llvm.umul.with.overflow.i64(i64 %a, i64 %b)
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%umul.0 = extractvalue %0 %umul, 0
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%mul1 = mul i64 %a, %b
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ret i64 %mul1
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}
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; CHECK: @test3
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; CHECK-NOT: mul1
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; CHECK: ret
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declare void @exit(i32) noreturn
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declare %0 @llvm.uadd.with.overflow.i64(i64, i64) nounwind readnone
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declare %0 @llvm.usub.with.overflow.i64(i64, i64) nounwind readnone
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declare %0 @llvm.umul.with.overflow.i64(i64, i64) nounwind readnone
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