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llvm-project/llvm/test/Transforms/InstCombine/strncpy-2.ll

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instcombine: Migrate strncpy optimizations This patch migrates the strncpy optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 167102
2012-10-31 11:33:00 +08:00
; Test that the strncpy 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"
@a = common global [32 x i8] zeroinitializer, align 1
declare i16* @strncpy(i8*, i8*, i32)
; Check that 'strncpy' functions with the wrong prototype aren't simplified.
define void @test_no_simplify1() {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test_no_simplify1(
instcombine: Migrate strncpy optimizations This patch migrates the strncpy optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 167102
2012-10-31 11:33:00 +08:00
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
%src = getelementptr [6 x i8]* @hello, i32 0, i32 0
call i16* @strncpy(i8* %dst, i8* %src, i32 6)
; CHECK: call i16* @strncpy
ret void
}