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llvm-project/llvm/test/Transforms/InstCombine/shift-sra.ll

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filecheckize llvm-svn: 92963
2010-01-08 07:42:23 +08:00
; RUN: opt < %s -instcombine -S | FileCheck %s
New testcase, can be an srl instead of sra llvm-svn: 30449
2006-09-18 12:31:18 +08:00
new testcases llvm-svn: 31585
2006-11-09 13:11:23 +08:00
Remove llvm-upgrade and update test cases. llvm-svn: 47793
2008-03-01 17:15:35 +08:00
define i32 @test1(i32 %X, i8 %A) {
%shift.upgrd.1 = zext i8 %A to i32 ; <i32> [#uses=1]
; can be logical shift.
%Y = ashr i32 %X, %shift.upgrd.1 ; <i32> [#uses=1]
%Z = and i32 %Y, 1 ; <i32> [#uses=1]
ret i32 %Z
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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test1(
filecheckize llvm-svn: 92963
2010-01-08 07:42:23 +08:00
; CHECK: lshr i32 %X, %shift.upgrd.1
new testcases llvm-svn: 31585
2006-11-09 13:11:23 +08:00
}
Remove llvm-upgrade and update test cases. llvm-svn: 47793
2008-03-01 17:15:35 +08:00
define i32 @test2(i8 %tmp) {
%tmp3 = zext i8 %tmp to i32 ; <i32> [#uses=1]
%tmp4 = add i32 %tmp3, 7 ; <i32> [#uses=1]
%tmp5 = ashr i32 %tmp4, 3 ; <i32> [#uses=1]
ret i32 %tmp5
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test2(
filecheckize llvm-svn: 92963
2010-01-08 07:42:23 +08:00
; CHECK: lshr i32 %tmp4, 3
Remove llvm-upgrade and update test cases. llvm-svn: 47793
2008-03-01 17:15:35 +08:00
}
teach ComputeNumSignBits to look through PHI nodes. llvm-svn: 92964
2010-01-08 07:44:37 +08:00
define i64 @test3(i1 %X, i64 %Y, i1 %Cond) {
br i1 %Cond, label %T, label %F
T:
%X2 = sext i1 %X to i64
br label %C
F:
%Y2 = ashr i64 %Y, 63
br label %C
C:
%P = phi i64 [%X2, %T], [%Y2, %F]
%S = ashr i64 %P, 12
ret i64 %S
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test3(
teach ComputeNumSignBits to look through PHI nodes. llvm-svn: 92964
2010-01-08 07:44:37 +08:00
; CHECK: %P = phi i64
; CHECK-NEXT: ret i64 %P
}
teach instcombine to delete sign extending shift pairs (sra(shl X, C), C) when the input is already sign extended. llvm-svn: 93019
2010-01-09 03:04:21 +08:00
define i64 @test4(i1 %X, i64 %Y, i1 %Cond) {
br i1 %Cond, label %T, label %F
T:
%X2 = sext i1 %X to i64
br label %C
F:
%Y2 = ashr i64 %Y, 63
br label %C
C:
%P = phi i64 [%X2, %T], [%Y2, %F]
%R = shl i64 %P, 12
%S = ashr i64 %R, 12
ret i64 %S
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test4(
teach instcombine to delete sign extending shift pairs (sra(shl X, C), C) when the input is already sign extended. llvm-svn: 93019
2010-01-09 03:04:21 +08:00
; CHECK: %P = phi i64
; CHECK-NEXT: ret i64 %P
}
Fix a typo in ValueTracking that's causing instcombine to delete needed shift instructions. llvm-svn: 98416
2010-03-13 10:20:29 +08:00
; rdar://7732987
define i32 @test5(i32 %Y) {
br i1 undef, label %A, label %C
A:
br i1 undef, label %B, label %D
B:
br label %D
C:
br i1 undef, label %D, label %E
D:
%P = phi i32 [0, %A], [0, %B], [%Y, %C]
%S = ashr i32 %P, 16
ret i32 %S
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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: @test5(
Fix a typo in ValueTracking that's causing instcombine to delete needed shift instructions. llvm-svn: 98416
2010-03-13 10:20:29 +08:00
; CHECK: %P = phi i32
; CHECK-NEXT: ashr i32 %P, 16
E:
ret i32 0
}