mirror of
https://github.com/c64scene-ar/llvm-6502.git
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8401ed21aa
if ((x & 255) == 255)
before: movzbl %al, %eax
cmpl $255, %eax
after: cmpb $-1, %al
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182038 91177308-0d34-0410-b5e6-96231b3b80d8
53 lines
944 B
LLVM
53 lines
944 B
LLVM
; RUN: llc < %s -march=x86-64 | FileCheck %s
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declare void @bar()
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define void @test1(i32* nocapture %X) nounwind {
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entry:
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%tmp1 = load i32* %X, align 4
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%and = and i32 %tmp1, 255
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%cmp = icmp eq i32 %and, 47
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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tail call void @bar() nounwind
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br label %if.end
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if.end:
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ret void
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; CHECK: test1:
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; CHECK: cmpb $47, (%{{rdi|rcx}})
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}
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define void @test2(i32 %X) nounwind {
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entry:
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%and = and i32 %X, 255
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%cmp = icmp eq i32 %and, 47
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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tail call void @bar() nounwind
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br label %if.end
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if.end:
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ret void
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; CHECK: test2:
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; CHECK: cmpb $47, %{{dil|cl}}
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}
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define void @test3(i32 %X) nounwind {
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entry:
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%and = and i32 %X, 255
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%cmp = icmp eq i32 %and, 255
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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tail call void @bar() nounwind
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br label %if.end
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if.end:
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ret void
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; CHECK: test3:
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; CHECK: cmpb $-1, %{{dil|cl}}
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}
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