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https://github.com/c64scene-ar/llvm-6502.git
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8047d9a6be
SDISel. This optimization was causing simplifylibcalls to introduce type-unsafe nastiness. This is the first step, I'll be expanding the memcmp optimizations shortly, covering things that we really really wouldn't want simplifylibcalls to do. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92098 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
952 B
LLVM
24 lines
952 B
LLVM
; Test that the memcmpOptimizer works correctly
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; RUN: opt < %s -simplify-libcalls -S | not grep {call.*memcmp}
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@h = constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=0]
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@hel = constant [4 x i8] c"hel\00" ; <[4 x i8]*> [#uses=0]
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@hello_u = constant [8 x i8] c"hello_u\00" ; <[8 x i8]*> [#uses=0]
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declare i32 @memcmp(i8*, i8*, i32)
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define void @test(i8* %P, i8* %Q, i32 %N, i32* %IP, i1* %BP) {
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%A = call i32 @memcmp( i8* %P, i8* %P, i32 %N ) ; <i32> [#uses=1]
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volatile store i32 %A, i32* %IP
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%B = call i32 @memcmp( i8* %P, i8* %Q, i32 0 ) ; <i32> [#uses=1]
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volatile store i32 %B, i32* %IP
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%C = call i32 @memcmp( i8* %P, i8* %Q, i32 1 ) ; <i32> [#uses=1]
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volatile store i32 %C, i32* %IP
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%F = call i32 @memcmp(i8* getelementptr ([4 x i8]* @hel, i32 0, i32 0),
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i8* getelementptr ([8 x i8]* @hello_u, i32 0, i32 0),
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i32 3)
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volatile store i32 %F, i32* %IP
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ret void
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}
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