maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/Transforms/InstSimplify/reassociate.ll

196 lines
3.6 KiB
LLVM
Raw Normal View History

Add generic simplification of associative operations, generalizing a couple of existing transforms. This fires surprisingly often, for example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well as various "and" simplifications (usually with a phi node operand). Most of the time this doesn't make a real difference since the same thing would have been done elsewhere anyway, eg: by instcombine, but there are a few places where this results in simplifications that we were not doing before. llvm-svn: 122326
2010-12-21 16:49:00 +08:00
; RUN: opt < %s -instsimplify -S | FileCheck %s
define i32 @add1(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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @add1(
Add generic simplification of associative operations, generalizing a couple of existing transforms. This fires surprisingly often, for example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well as various "and" simplifications (usually with a phi node operand). Most of the time this doesn't make a real difference since the same thing would have been done elsewhere anyway, eg: by instcombine, but there are a few places where this results in simplifications that we were not doing before. llvm-svn: 122326
2010-12-21 16:49:00 +08:00
; (X + -1) + 1 -> X
%l = add i32 %x, -1
%r = add i32 %l, 1
ret i32 %r
; CHECK: ret i32 %x
}
define i32 @and1(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @and1(
Add generic simplification of associative operations, generalizing a couple of existing transforms. This fires surprisingly often, for example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well as various "and" simplifications (usually with a phi node operand). Most of the time this doesn't make a real difference since the same thing would have been done elsewhere anyway, eg: by instcombine, but there are a few places where this results in simplifications that we were not doing before. llvm-svn: 122326
2010-12-21 16:49:00 +08:00
; (X & Y) & X -> X & Y
%l = and i32 %x, %y
%r = and i32 %l, %x
ret i32 %r
; CHECK: ret i32 %l
}
define i32 @and2(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @and2(
Add generic simplification of associative operations, generalizing a couple of existing transforms. This fires surprisingly often, for example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well as various "and" simplifications (usually with a phi node operand). Most of the time this doesn't make a real difference since the same thing would have been done elsewhere anyway, eg: by instcombine, but there are a few places where this results in simplifications that we were not doing before. llvm-svn: 122326
2010-12-21 16:49:00 +08:00
; X & (X & Y) -> X & Y
%r = and i32 %x, %y
%l = and i32 %x, %r
ret i32 %l
; CHECK: ret i32 %r
}
define i32 @or1(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @or1(
Add generic simplification of associative operations, generalizing a couple of existing transforms. This fires surprisingly often, for example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well as various "and" simplifications (usually with a phi node operand). Most of the time this doesn't make a real difference since the same thing would have been done elsewhere anyway, eg: by instcombine, but there are a few places where this results in simplifications that we were not doing before. llvm-svn: 122326
2010-12-21 16:49:00 +08:00
; (X | Y) | X -> X | Y
%l = or i32 %x, %y
%r = or i32 %l, %x
ret i32 %r
; CHECK: ret i32 %l
}
define i32 @or2(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @or2(
Add generic simplification of associative operations, generalizing a couple of existing transforms. This fires surprisingly often, for example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well as various "and" simplifications (usually with a phi node operand). Most of the time this doesn't make a real difference since the same thing would have been done elsewhere anyway, eg: by instcombine, but there are a few places where this results in simplifications that we were not doing before. llvm-svn: 122326
2010-12-21 16:49:00 +08:00
; X | (X | Y) -> X | Y
%r = or i32 %x, %y
%l = or i32 %x, %r
ret i32 %l
; CHECK: ret i32 %r
}
define i32 @xor1(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @xor1(
Add generic simplification of associative operations, generalizing a couple of existing transforms. This fires surprisingly often, for example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well as various "and" simplifications (usually with a phi node operand). Most of the time this doesn't make a real difference since the same thing would have been done elsewhere anyway, eg: by instcombine, but there are a few places where this results in simplifications that we were not doing before. llvm-svn: 122326
2010-12-21 16:49:00 +08:00
; (X ^ Y) ^ X = Y
%l = xor i32 %x, %y
%r = xor i32 %l, %x
ret i32 %r
; CHECK: ret i32 %y
}
define i32 @xor2(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @xor2(
Add generic simplification of associative operations, generalizing a couple of existing transforms. This fires surprisingly often, for example when compiling gcc "(X+(-1))+1->X" fires quite a lot as well as various "and" simplifications (usually with a phi node operand). Most of the time this doesn't make a real difference since the same thing would have been done elsewhere anyway, eg: by instcombine, but there are a few places where this results in simplifications that we were not doing before. llvm-svn: 122326
2010-12-21 16:49:00 +08:00
; X ^ (X ^ Y) = Y
%r = xor i32 %x, %y
%l = xor i32 %x, %r
ret i32 %l
; CHECK: ret i32 %y
}
Turn X-(X-Y) into Y. According to my auto-simplifier this is the most common simplification present in fully optimized code (I think instcombine fails to transform some of these when "X-Y" has more than one use). Fires here and there all over the test-suite, for example it eliminates 8 subtractions in the final IR for 445.gobmk, 2 subs in 447.dealII, 2 in paq8p etc. llvm-svn: 123442
2011-01-14 23:26:10 +08:00
define i32 @sub1(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @sub1(
Turn X-(X-Y) into Y. According to my auto-simplifier this is the most common simplification present in fully optimized code (I think instcombine fails to transform some of these when "X-Y" has more than one use). Fires here and there all over the test-suite, for example it eliminates 8 subtractions in the final IR for 445.gobmk, 2 subs in 447.dealII, 2 in paq8p etc. llvm-svn: 123442
2011-01-14 23:26:10 +08:00
%d = sub i32 %x, %y
%r = sub i32 %x, %d
ret i32 %r
; CHECK: ret i32 %y
}
For completeness, generalize the (X + Y) - Y -> X transform and add X - (X + 1) -> -1. These were not recommended by my auto-simplifier since they don't fire often enough. However they do fire from time to time, for example they remove one subtraction from the final bitcode for 483.xalancbmk. llvm-svn: 123755
2011-01-18 19:50:19 +08:00
define i32 @sub2(i32 %x) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @sub2(
For completeness, generalize the (X + Y) - Y -> X transform and add X - (X + 1) -> -1. These were not recommended by my auto-simplifier since they don't fire often enough. However they do fire from time to time, for example they remove one subtraction from the final bitcode for 483.xalancbmk. llvm-svn: 123755
2011-01-18 19:50:19 +08:00
; X - (X + 1) -> -1
%xp1 = add i32 %x, 1
%r = sub i32 %x, %xp1
ret i32 %r
; CHECK: ret i32 -1
}
define i32 @sub3(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @sub3(
For completeness, generalize the (X + Y) - Y -> X transform and add X - (X + 1) -> -1. These were not recommended by my auto-simplifier since they don't fire often enough. However they do fire from time to time, for example they remove one subtraction from the final bitcode for 483.xalancbmk. llvm-svn: 123755
2011-01-18 19:50:19 +08:00
; ((X + 1) + Y) - (Y + 1) -> X
%xp1 = add i32 %x, 1
%lhs = add i32 %xp1, %y
%rhs = add i32 %y, 1
%r = sub i32 %lhs, %rhs
ret i32 %r
; CHECK: ret i32 %x
}
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
define i32 @sdiv1(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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: @sdiv1(
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
; (no overflow X * Y) / Y -> X
%mul = mul nsw i32 %x, %y
%r = sdiv i32 %mul, %y
ret i32 %r
Reenable the transform "(X*Y)/Y->X" when the multiplication is known not to overflow (nsw flag), which was disabled because it breaks 254.gap. I have informed the GAP authors of the mistake in their code, and arranged for the testsuite to use -fwrapv when compiling this benchmark. llvm-svn: 124746
2011-02-03 04:52:00 +08:00
; CHECK: ret i32 %x
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
}
define i32 @sdiv2(i32 %x, i32 %y) {
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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @sdiv2(
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
; (((X / Y) * Y) / Y) -> X / Y
%div = sdiv i32 %x, %y
%mul = mul i32 %div, %y
%r = sdiv i32 %mul, %y
ret i32 %r
; CHECK: ret i32 %div
}
define i32 @sdiv3(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @sdiv3(
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
; (X rem Y) / Y -> 0
%rem = srem i32 %x, %y
%div = sdiv i32 %rem, %y
ret i32 %div
; CHECK: ret i32 0
}
Transform (X/Y)*Y into X if the division is exact. Instcombine already knows how to do this and more, but would only do it if X/Y had only one use. Spotted as the most common missed simplification in SPEC by my auto-simplifier, now that it knows about nuw/nsw/exact flags. This removes a bunch of multiplications from 447.dealII and 483.xalancbmk. It also removes a lot from tramp3d-v4, which results in much more inlining. llvm-svn: 124560
2011-01-31 02:03:50 +08:00
define i32 @sdiv4(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @sdiv4(
Transform (X/Y)*Y into X if the division is exact. Instcombine already knows how to do this and more, but would only do it if X/Y had only one use. Spotted as the most common missed simplification in SPEC by my auto-simplifier, now that it knows about nuw/nsw/exact flags. This removes a bunch of multiplications from 447.dealII and 483.xalancbmk. It also removes a lot from tramp3d-v4, which results in much more inlining. llvm-svn: 124560
2011-01-31 02:03:50 +08:00
; (X / Y) * Y -> X if the division is exact
%div = sdiv exact i32 %x, %y
%mul = mul i32 %div, %y
ret i32 %mul
; CHECK: ret i32 %x
}
define i32 @sdiv5(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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: @sdiv5(
Transform (X/Y)*Y into X if the division is exact. Instcombine already knows how to do this and more, but would only do it if X/Y had only one use. Spotted as the most common missed simplification in SPEC by my auto-simplifier, now that it knows about nuw/nsw/exact flags. This removes a bunch of multiplications from 447.dealII and 483.xalancbmk. It also removes a lot from tramp3d-v4, which results in much more inlining. llvm-svn: 124560
2011-01-31 02:03:50 +08:00
; Y * (X / Y) -> X if the division is exact
%div = sdiv exact i32 %x, %y
%mul = mul i32 %y, %div
ret i32 %mul
; CHECK: ret i32 %x
}
teach instsimplify to transform (X / Y) * Y to X when the div is an exact udiv. llvm-svn: 124994
2011-02-07 06:05:31 +08:00
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
define i32 @udiv1(i32 %x, i32 %y) {
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: @udiv1(
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
; (no overflow X * Y) / Y -> X
%mul = mul nuw i32 %x, %y
%r = udiv i32 %mul, %y
ret i32 %r
Reenable the transform "(X*Y)/Y->X" when the multiplication is known not to overflow (nsw flag), which was disabled because it breaks 254.gap. I have informed the GAP authors of the mistake in their code, and arranged for the testsuite to use -fwrapv when compiling this benchmark. llvm-svn: 124746
2011-02-03 04:52:00 +08:00
; CHECK: ret i32 %x
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
}
define i32 @udiv2(i32 %x, i32 %y) {
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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @udiv2(
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
; (((X / Y) * Y) / Y) -> X / Y
%div = udiv i32 %x, %y
%mul = mul i32 %div, %y
%r = udiv i32 %mul, %y
ret i32 %r
; CHECK: ret i32 %div
}
define i32 @udiv3(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @udiv3(
My auto-simplifier noticed that ((X/Y)*Y)/Y occurs several times in SPEC benchmarks, and that it can be simplified to X/Y. (In general you can only simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the form "X/Y" then this is the case). This patch implements that transform and moves some Div logic out of instcombine and into InstructionSimplify. Unfortunately instcombine gets in the way somewhat, since it likes to change (X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too. Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y" does not overflow, because the flag says so, so I added that logic too. This eliminates a bunch of divisions and subtractions in 447.dealII, and has good effects on some other benchmarks too. It seems to have quite an effect on tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions changed, resulting in massive changes all over. llvm-svn: 124487
2011-01-29 00:51:11 +08:00
; (X rem Y) / Y -> 0
%rem = urem i32 %x, %y
%div = udiv i32 %rem, %y
ret i32 %div
; CHECK: ret i32 0
}
teach instsimplify to transform (X / Y) * Y to X when the div is an exact udiv. llvm-svn: 124994
2011-02-07 06:05:31 +08:00
define i32 @udiv4(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @udiv4(
teach instsimplify to transform (X / Y) * Y to X when the div is an exact udiv. llvm-svn: 124994
2011-02-07 06:05:31 +08:00
; (X / Y) * Y -> X if the division is exact
%div = udiv exact i32 %x, %y
%mul = mul i32 %div, %y
ret i32 %mul
; CHECK: ret i32 %x
}
define i32 @udiv5(i32 %x, i32 %y) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @udiv5(
teach instsimplify to transform (X / Y) * Y to X when the div is an exact udiv. llvm-svn: 124994
2011-02-07 06:05:31 +08:00
; Y * (X / Y) -> X if the division is exact
%div = udiv exact i32 %x, %y
%mul = mul i32 %y, %div
ret i32 %mul
; CHECK: ret i32 %x
}
Generalize the "trunc(ptrtoint(x)) - trunc(ptrtoint(y)) -> trunc(ptrtoint(x-y))" optimization introduced by Chandler. llvm-svn: 152626
2012-03-13 22:07:05 +08:00
define i16 @trunc1(i32 %x) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 09:42:54 +08:00
; CHECK-LABEL: @trunc1(
Generalize the "trunc(ptrtoint(x)) - trunc(ptrtoint(y)) -> trunc(ptrtoint(x-y))" optimization introduced by Chandler. llvm-svn: 152626
2012-03-13 22:07:05 +08:00
%y = add i32 %x, 1
%tx = trunc i32 %x to i16
%ty = trunc i32 %y to i16
%d = sub i16 %ty, %tx
ret i16 %d
; CHECK: ret i16 1
}