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https://github.com/c64scene-ar/llvm-6502.git
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a239c2e6a7
This patch migrates the strcmp and strncmp optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165915 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
959 B
LLVM
34 lines
959 B
LLVM
; PR4738 - Test that the library call simplifier doesn't assume anything about
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; weak symbols.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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@real_init = weak_odr constant [2 x i8] c"y\00"
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@fake_init = weak constant [2 x i8] c"y\00"
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@.str = private constant [2 x i8] c"y\00"
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define i32 @foo() nounwind {
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; CHECK: define i32 @foo
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; CHECK: call i32 @strcmp
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; CHECK: ret i32 %temp1
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entry:
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%str1 = getelementptr inbounds [2 x i8]* @fake_init, i64 0, i64 0
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%str2 = getelementptr inbounds [2 x i8]* @.str, i64 0, i64 0
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%temp1 = call i32 @strcmp(i8* %str1, i8* %str2) nounwind readonly
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ret i32 %temp1
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}
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define i32 @bar() nounwind {
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; CHECK: define i32 @bar
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; CHECK: ret i32 0
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entry:
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%str1 = getelementptr inbounds [2 x i8]* @real_init, i64 0, i64 0
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%str2 = getelementptr inbounds [2 x i8]* @.str, i64 0, i64 0
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%temp1 = call i32 @strcmp(i8* %str1, i8* %str2) nounwind readonly
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ret i32 %temp1
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}
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declare i32 @strcmp(i8*, i8*) nounwind readonly
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