llvm-mirror/test/Transforms/InstSimplify/AndOrXor.ll

; RUN: opt < %s -instsimplify -S | FileCheck %s

define i64 @pow2(i32 %x) {
; CHECK-LABEL: @pow2(
  %negx = sub i32 0, %x
  %x2 = and i32 %x, %negx
  %e = zext i32 %x2 to i64
  %nege = sub i64 0, %e
  %e2 = and i64 %e, %nege
  ret i64 %e2
; CHECK: ret i64 %e
}

define i64 @pow2b(i32 %x) {
; CHECK-LABEL: @pow2b(
  %sh = shl i32 2, %x
  %e = zext i32 %sh to i64
  %nege = sub i64 0, %e
  %e2 = and i64 %e, %nege
  ret i64 %e2
; CHECK: ret i64 %e
}
The maximum power of 2 dividing a power of 2 is itself. This occurs in 403.gcc and was spotted by my super-optimizer. llvm-svn: 143054 2011-10-26 22:55:21 +02:00			`; RUN: opt < %s -instsimplify -S \| FileCheck %s`

			`define i64 @pow2(i32 %x) {`
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 $NAME fi done llvm-svn: 186268 2013-07-14 03:42:54 +02:00			`; CHECK-LABEL: @pow2(`
The maximum power of 2 dividing a power of 2 is itself. This occurs in 403.gcc and was spotted by my super-optimizer. llvm-svn: 143054 2011-10-26 22:55:21 +02:00			`%negx = sub i32 0, %x`
			`%x2 = and i32 %x, %negx`
			`%e = zext i32 %x2 to i64`
			`%nege = sub i64 0, %e`
			`%e2 = and i64 %e, %nege`
			`ret i64 %e2`
			`; CHECK: ret i64 %e`
			`}`
A shift of a power of two is a power of two or zero. For completeness - not spotted in the wild. llvm-svn: 143211 2011-10-28 20:30:05 +02:00
			`define i64 @pow2b(i32 %x) {`
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name ".ll" \| \ while read NAME; do echo "$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 03:42:54 +02:00			`; CHECK-LABEL: @pow2b(`
A shift of a power of two is a power of two or zero. For completeness - not spotted in the wild. llvm-svn: 143211 2011-10-28 20:30:05 +02:00			`%sh = shl i32 2, %x`
			`%e = zext i32 %sh to i64`
			`%nege = sub i64 0, %e`
			`%e2 = and i64 %e, %nege`
			`ret i64 %e2`
			`; CHECK: ret i64 %e`
			`}`