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https://github.com/c64scene-ar/llvm-6502.git
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40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
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; RUN: opt -S -instcombine < %s | FileCheck %s
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@c = common global i8 0, align 1
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@a = common global i8 0, align 1
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@b = common global i8 0, align 1
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define void @func() nounwind uwtable ssp {
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entry:
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%0 = load i8* @c, align 1
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%conv = zext i8 %0 to i32
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%or = or i32 %conv, 1
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%conv1 = trunc i32 %or to i8
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store i8 %conv1, i8* @a, align 1
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%conv2 = zext i8 %conv1 to i32
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%neg = xor i32 %conv2, -1
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%and = and i32 1, %neg
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%conv3 = trunc i32 %and to i8
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store i8 %conv3, i8* @b, align 1
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%1 = load i8* @a, align 1
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%conv4 = zext i8 %1 to i32
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%conv5 = zext i8 %conv3 to i32
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%tobool = icmp ne i32 %conv4, 0
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br i1 %tobool, label %land.rhs, label %land.end
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land.rhs: ; preds = %entry
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%tobool8 = icmp ne i32 %conv5, 0
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br label %land.end
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land.end: ; preds = %land.rhs, %entry
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%2 = phi i1 [ false, %entry ], [ %tobool8, %land.rhs ]
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%land.ext = zext i1 %2 to i32
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%mul = mul nsw i32 3, %land.ext
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%conv9 = trunc i32 %mul to i8
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store i8 %conv9, i8* @a, align 1
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ret void
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; CHECK: @func
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; CHECK-NOT: select
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}
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