llvm-mirror/test/CodeGen/ARM/atomicrmw_minmax.ll

; RUN: llc -mtriple=arm-eabi -mcpu=cortex-a9 %s -o - | FileCheck %s

;  CHECK-LABEL: max:
define i32 @max(i8 %ctx, i32* %ptr, i32 %val)
{
;  CHECK: ldrex
;  CHECK: cmp [[old:r[0-9]*]], [[val:r[0-9]*]]
;  CHECK: movhi {{r[0-9]*}}, [[old]]
  %old = atomicrmw umax i32* %ptr, i32 %val monotonic
  ret i32 %old
}

;  CHECK-LABEL: min:
define i32 @min(i8 %ctx, i32* %ptr, i32 %val)
{
;  CHECK: ldrex
;  CHECK: cmp [[old:r[0-9]*]], [[val:r[0-9]*]]
;  CHECK: movls {{r[0-9]*}}, [[old]]
  %old = atomicrmw umin i32* %ptr, i32 %val monotonic
  ret i32 %old
}
ARM: fixup more tests to specify the target more explicitly This changes the tests that were targeting ARM EABI to explicitly specify the environment rather than relying on the default. This breaks with the new Windows on ARM support when running the tests on Windows where the default environment is no longer EABI. Take the opportunity to avoid a pointless redirect (helps when trying to debug with providing a command line invocation which can be copy and pasted) and removing a few greps in favour of FileCheck. llvm-svn: 205541 2014-04-03 16:01:44 +00:00			`; RUN: llc -mtriple=arm-eabi -mcpu=cortex-a9 %s -o - \| FileCheck %s`
Fix ordering of operands on lowering of atomicrmw min/max nodes on ARM. llvm-svn: 164685 2012-09-26 09:48:32 +00:00
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 06:24:09 +00:00			`; CHECK-LABEL: max:`
Fix ordering of operands on lowering of atomicrmw min/max nodes on ARM. llvm-svn: 164685 2012-09-26 09:48:32 +00:00			`define i32 @max(i8 %ctx, i32* %ptr, i32 %val)`
			`{`
			`; CHECK: ldrex`
			`; CHECK: cmp [[old:r[0-9]]], [[val:r[0-9]]]`
			`; CHECK: movhi {{r[0-9]*}}, [[old]]`
			`%old = atomicrmw umax i32* %ptr, i32 %val monotonic`
			`ret i32 %old`
			`}`

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 06:24:09 +00:00			`; CHECK-LABEL: min:`
Fix ordering of operands on lowering of atomicrmw min/max nodes on ARM. llvm-svn: 164685 2012-09-26 09:48:32 +00:00			`define i32 @min(i8 %ctx, i32* %ptr, i32 %val)`
			`{`
			`; CHECK: ldrex`
			`; CHECK: cmp [[old:r[0-9]]], [[val:r[0-9]]]`
ARM: expand atomic ldrex/strex loops in IR The previous situation where ATOMIC_LOAD_WHATEVER nodes were expanded at MachineInstr emission time had grown to be extremely large and involved, to account for the subtly different code needed for the various flavours (8/16/32/64 bit, cmpxchg/add/minmax). Moving this transformation into the IR clears up the code substantially, and makes future optimisations much easier: 1. an atomicrmw followed by using the new value can be more efficient. As an IR pass, simple CSE could handle this efficiently. 2. Making use of cmpxchg success/failure orderings only has to be done in one (simpler) place. 3. The common "cmpxchg; did we store?" idiom can be exposed to optimisation. I intend to gradually improve this situation within the ARM backend and make sure there are no hidden issues before moving the code out into CodeGen to be shared with (at least ARM64/AArch64, though I think PPC & Mips could benefit too). llvm-svn: 205525 2014-04-03 11:44:58 +00:00			`; CHECK: movls {{r[0-9]*}}, [[old]]`
Fix ordering of operands on lowering of atomicrmw min/max nodes on ARM. llvm-svn: 164685 2012-09-26 09:48:32 +00:00			`%old = atomicrmw umin i32* %ptr, i32 %val monotonic`
			`ret i32 %old`
			`}`