llvm-6502/test/Transforms/InstCombine/strcmp-2.ll
Meador Inge a239c2e6a7 instcombine: Migrate strcmp and strncmp optimizations
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
2012-10-15 03:47:37 +00:00

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668 B
LLVM

; Test that the strcmp library call simplifier works correctly.
; RUN: opt < %s -instcombine -S | FileCheck %s
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"
@hello = constant [6 x i8] c"hello\00"
@hell = constant [5 x i8] c"hell\00"
declare i16 @strcmp(i8*, i8*)
define i16 @test_nosimplify() {
; CHECK: @test_nosimplify
; CHECK: call i16 @strcmp
; CHECK: ret i16 %temp1
%str1 = getelementptr inbounds [5 x i8]* @hell, i32 0, i32 0
%str2 = getelementptr inbounds [6 x i8]* @hello, i32 0, i32 0
%temp1 = call i16 @strcmp(i8* %str1, i8* %str2)
ret i16 %temp1
}