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llvm-project/llvm/test/Transforms/InstCombine/weak-symbols.ll

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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. llvm-svn: 165915
2012-10-15 11:47:37 +08:00
; PR4738 - Test that the library call simplifier doesn't assume anything about
; weak symbols.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
@real_init = weak_odr constant [2 x i8] c"y\00"
@fake_init = weak constant [2 x i8] c"y\00"
@.str = private constant [2 x i8] c"y\00"
define i32 @foo() nounwind {
Catch more CHECK that can be converted to CHECK-LABEL in Transforms for easier debugging. No functionality change. This conversion 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/;\(.*\)\([A-Za-z0-9_]*\):\( *\)define\([^@]*\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3define\4@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186269
2013-07-14 09:50:49 +08:00
; CHECK-LABEL: define i32 @foo(
instcombine: Migrate strcmp and strncmp optimizations This patch migrates the strcmp and strncmp optimizations from the simplify-libcalls pass into the instcombine library call simplifier. llvm-svn: 165915
2012-10-15 11:47:37 +08:00
; CHECK: call i32 @strcmp
; CHECK: ret i32 %temp1
entry:
%str1 = getelementptr inbounds [2 x i8]* @fake_init, i64 0, i64 0
%str2 = getelementptr inbounds [2 x i8]* @.str, i64 0, i64 0
%temp1 = call i32 @strcmp(i8* %str1, i8* %str2) nounwind readonly
ret i32 %temp1
}
define i32 @bar() nounwind {
Catch more CHECK that can be converted to CHECK-LABEL in Transforms for easier debugging. No functionality change. This conversion was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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/;\(.*\)\([A-Za-z0-9_]*\):\( *\)define\([^@]*\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3define\4@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186269
2013-07-14 09:50:49 +08:00
; CHECK-LABEL: define i32 @bar(
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. llvm-svn: 165915
2012-10-15 11:47:37 +08:00
; CHECK: ret i32 0
entry:
%str1 = getelementptr inbounds [2 x i8]* @real_init, i64 0, i64 0
%str2 = getelementptr inbounds [2 x i8]* @.str, i64 0, i64 0
%temp1 = call i32 @strcmp(i8* %str1, i8* %str2) nounwind readonly
ret i32 %temp1
}
declare i32 @strcmp(i8*, i8*) nounwind readonly