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llvm-project/llvm/test/CodeGen/Thumb/select.ll

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[ARM] Fix CPSR liveness in tMOVCCr_pseudo lowering. The lowering was missing live-ins in certain cases, like a sequence of multiple tMOVCCr_pseudo instructions. This would lead to a verifier failure, and on pre-v6 Thumb CPSR would be incorrectly clobbered. For reasons I don't completely understand, it's hard to get a sequence of multiple tMOVCCr_pseudo instructions; the issue only seems to show up with 64-bit comparisons where the result is zero-extended. I added some extra testcases in case that changes in the future. Probably some optimization opportunities here if anyone is interested. (@test_slt_not is the case that was getting miscompiled.) The code to check the liveness of CPSR was stolen from X86ISelLowering.cpp; maybe it could be refactored into common helper, but I have no idea where to put it. Differential Revision: https://reviews.llvm.org/D54192 llvm-svn: 346355
2018-11-08 05:08:13 +08:00
; RUN: llc < %s -mtriple=thumb-apple-darwin -verify-machineinstrs | FileCheck %s
; RUN: llc < %s -mtriple=thumb-pc-linux-gnueabi -verify-machineinstrs | FileCheck -check-prefix=CHECK-EABI %s
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
define i32 @f1(i32 %a.s) {
entry:
%tmp = icmp eq i32 %a.s, 4
%tmp1.s = select i1 %tmp, i32 2, i32 3
ret i32 %tmp1.s
}
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: f1:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK: beq
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-EABI-LABEL: f1:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK-EABI: beq
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
define i32 @f2(i32 %a.s) {
entry:
%tmp = icmp sgt i32 %a.s, 4
%tmp1.s = select i1 %tmp, i32 2, i32 3
ret i32 %tmp1.s
}
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: f2:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK: bgt
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-EABI-LABEL: f2:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK-EABI: bgt
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
define i32 @f3(i32 %a.s, i32 %b.s) {
entry:
%tmp = icmp slt i32 %a.s, %b.s
%tmp1.s = select i1 %tmp, i32 2, i32 3
ret i32 %tmp1.s
}
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: f3:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK: blt
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-EABI-LABEL: f3:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK-EABI: blt
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
define i32 @f4(i32 %a.s, i32 %b.s) {
entry:
%tmp = icmp sle i32 %a.s, %b.s
%tmp1.s = select i1 %tmp, i32 2, i32 3
ret i32 %tmp1.s
}
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: f4:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK: ble
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-EABI-LABEL: f4:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK-EABI: ble
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
define i32 @f5(i32 %a.u, i32 %b.u) {
entry:
%tmp = icmp ule i32 %a.u, %b.u
%tmp1.s = select i1 %tmp, i32 2, i32 3
ret i32 %tmp1.s
}
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: f5:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK: bls
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-EABI-LABEL: f5:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK-EABI: bls
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
define i32 @f6(i32 %a.u, i32 %b.u) {
entry:
%tmp = icmp ugt i32 %a.u, %b.u
%tmp1.s = select i1 %tmp, i32 2, i32 3
ret i32 %tmp1.s
}
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: f6:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK: bhi
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-EABI-LABEL: f6:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK-EABI: bhi
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
define double @f7(double %a, double %b) {
%tmp = fcmp olt double %a, 1.234e+00
%tmp1 = select i1 %tmp, double -1.000e+00, double %b
ret double %tmp1
}
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-LABEL: f7:
[ARM] Favour PL/MI over GE/LT when possible The arm condition codes for GE is N==V (and for LT is N!=V). If the source of flags cannot set V (overflow), such as a cmp against #0, then we can use the simpler PL and MI conditions that only check N. As these PL/MI conditions are simpler than GE/LT, other passes like the peephole optimiser can have a better time optimising away the redundant CMPs. The exception is the VSEL instruction, which cannot take the PL code, so there the transform favours GE. Differential Revision: https://reviews.llvm.org/D64160 llvm-svn: 365117
2019-07-04 16:58:58 +08:00
; CHECK: {{bmi|bpl}}
; CHECK: {{bmi|bpl}}
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK: __ltdf2
Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally. This update was done with the following bash script: find test/CodeGen -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc.*debug" $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 sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP mv $TEMP $NAME fi done llvm-svn: 186280
2013-07-14 14:24:09 +08:00
; CHECK-EABI-LABEL: f7:
FileCheck-ize test, and make it work on EABI hosts, like clang-native-arm-cortex-a9. llvm-svn: 133139
2011-06-16 10:36:32 +08:00
; CHECK-EABI: __aeabi_dcmplt
[ARM] Make InstrEmitter mark CPSR defs dead for Thumb1. The "dead" markings allow existing target-independent optimizations, like MachineSink, to trigger more frequently. The CPSR defs would have eventually been marked dead by LiveVariables, so this only affects optimizations before regalloc. The ARMBaseInstrInfo.cpp change is fixing a bug which is only visible with this change: the transform adds a use to an otherwise dead def of CPSR. This is covered by existing regression tests. thumb2-tbh.ll breaks for Thumb1 due to MachineLICM changing the generated code; I'll fix it in D53452. Differential Revision: https://reviews.llvm.org/D53453 llvm-svn: 345420
2018-10-27 03:32:24 +08:00
; CHECK-EABI: {{bne|beq}}
[ARM] Allow rematerialization of ARM Thumb literal pool loads Constants are crucial for code size in the ARM Thumb-1 instruction set. The 16 bit instruction size often does not offer enough space for immediate arguments. This means that additional instructions are frequently used to load constants into registers. Since constants are hoisted, this can lead to significant register spillage if they are used multiple times in a single function. This can be avoided by rematerialization, i.e. recomputing a constant instead of reloading it from the stack. This patch fixes the rematerialization of literal pool loads in the ARM Thumb instruction set. Patch by Philip Ginsbach Differential Revision: https://reviews.llvm.org/D33936 llvm-svn: 308004
2017-07-14 16:23:56 +08:00
; CHECK-EABI: {{bne|beq}}
[ARM] Fix CPSR liveness in tMOVCCr_pseudo lowering. The lowering was missing live-ins in certain cases, like a sequence of multiple tMOVCCr_pseudo instructions. This would lead to a verifier failure, and on pre-v6 Thumb CPSR would be incorrectly clobbered. For reasons I don't completely understand, it's hard to get a sequence of multiple tMOVCCr_pseudo instructions; the issue only seems to show up with 64-bit comparisons where the result is zero-extended. I added some extra testcases in case that changes in the future. Probably some optimization opportunities here if anyone is interested. (@test_slt_not is the case that was getting miscompiled.) The code to check the liveness of CPSR was stolen from X86ISelLowering.cpp; maybe it could be refactored into common helper, but I have no idea where to put it. Differential Revision: https://reviews.llvm.org/D54192 llvm-svn: 346355
2018-11-08 05:08:13 +08:00
define {i32, i32} @f8(i32 %a, i32 %b, i32 %c, i32 %d) {
entry:
%cmp = icmp slt i32 %a, %b
%r1 = select i1 %cmp, i32 %c, i32 %a
%r2 = select i1 %cmp, i32 %d, i32 %b
%z = insertvalue { i32, i32 } undef, i32 %r1, 0
%z2 = insertvalue { i32, i32 } %z, i32 %r2, 1
ret { i32, i32 } %z2
}
; CHECK-LABEL: f8:
; CHECK: cmp r0, r1
; CHECK: blt
; CHECK: movs
; CHECK: cmp r0, r1
; CHECK: blt
; CHECK: movs
; CHECK: movs
; CHECK: movs
; CHECK: bx lr