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https://github.com/c64scene-ar/llvm-6502.git
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122 lines
3.4 KiB
LLVM
122 lines
3.4 KiB
LLVM
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; Test that the memchr library call simplifier works correctly.
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; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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@hello = constant [14 x i8] c"hello world\5Cn\00"
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@hellonull = constant [14 x i8] c"hello\00world\5Cn\00"
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@null = constant [1 x i8] zeroinitializer
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@chp = global i8* zeroinitializer
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declare i8* @memchr(i8*, i32, i32)
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define void @test1() {
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; CHECK-LABEL: @test1
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; CHECK: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 6)
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%str = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
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%dst = call i8* @memchr(i8* %str, i32 119, i32 14)
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store i8* %dst, i8** @chp
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ret void
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}
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define void @test2() {
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; CHECK-LABEL: @test2
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; CHECK: store i8* null, i8** @chp, align 4
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
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%dst = call i8* @memchr(i8* %str, i32 119, i32 1)
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store i8* %dst, i8** @chp
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ret void
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}
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define void @test3() {
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; CHECK-LABEL: @test3
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; CHECK: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 13)
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
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%dst = call i8* @memchr(i8* %src, i32 0, i32 14)
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store i8* %dst, i8** @chp
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ret void
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}
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define void @test4(i32 %chr) {
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; CHECK-LABEL: @test4
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; CHECK: call i8* @memchr
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
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%dst = call i8* @memchr(i8* %src, i32 %chr, i32 14)
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store i8* %dst, i8** @chp
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ret void
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}
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define void @test5() {
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; CHECK-LABEL: @test5
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; CHECK: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 13)
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
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%dst = call i8* @memchr(i8* %src, i32 65280, i32 14)
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store i8* %dst, i8** @chp
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ret void
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}
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define void @test6() {
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; CHECK-LABEL: @test6
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; CHECK: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 6)
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
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; Overflow, but we still find the right thing.
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%dst = call i8* @memchr(i8* %src, i32 119, i32 100)
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store i8* %dst, i8** @chp
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ret void
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}
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define void @test7() {
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; CHECK-LABEL: @test7
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; CHECK: store i8* null, i8** @chp, align 4
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0
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; Overflow
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%dst = call i8* @memchr(i8* %src, i32 120, i32 100)
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store i8* %dst, i8** @chp
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ret void
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}
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define void @test8() {
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; CHECK-LABEL: @test8
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; CHECK: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hellonull, i32 0, i32 6)
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%str = getelementptr [14 x i8], [14 x i8]* @hellonull, i32 0, i32 0
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%dst = call i8* @memchr(i8* %str, i32 119, i32 14)
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store i8* %dst, i8** @chp
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ret void
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}
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define void @test9() {
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; CHECK-LABEL: @test9
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; CHECK: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hellonull, i32 0, i32 6)
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; CHECK-NOT: call i8* @memchr
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; CHECK: ret void
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%str = getelementptr [14 x i8], [14 x i8]* @hellonull, i32 0, i32 2
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%dst = call i8* @memchr(i8* %str, i32 119, i32 12)
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store i8* %dst, i8** @chp
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ret void
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}
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