maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/codegen-prepare.ll

46 lines
1.7 KiB
LLVM
Raw Normal View History

Fix a bug in codegenprep where it was losing track of values OptimizeMemoryInst by switching to a ValueMap. Patch by Andrea DiBiagio! llvm-svn: 181397
2013-05-08 17:00:10 +08:00
; RUN: llc < %s -mtriple=x86_64-pc-linux | FileCheck %s
Add the ability to use GEPs for address sinking in CGP The current memory-instruction optimization logic in CGP, which sinks parts of the address computation that can be adsorbed by the addressing mode, does this by explicitly converting the relevant part of the address computation into IR-level integer operations (making use of ptrtoint and inttoptr). For most targets this is currently not a problem, but for targets wishing to make use of IR-level aliasing analysis during CodeGen, the use of ptrtoint/inttoptr is a problem for two reasons: 1. BasicAA becomes less powerful in the face of the ptrtoint/inttoptr 2. In cases where type-punning was used, and BasicAA was used to override TBAA, BasicAA may no longer do so. (this had forced us to disable all use of TBAA in CodeGen; something which we can now enable again) This (use of GEPs instead of ptrtoint/inttoptr) is not currently enabled by default (except for those targets that use AA during CodeGen), and so aside from some PowerPC subtargets and SystemZ, there should be no change in behavior. We may be able to switch completely away from the ptrtoint/inttoptr sinking on all targets, but further testing is required. I've doubled-up on a number of existing tests that are sensitive to the address sinking behavior (including some store-merging tests that are sensitive to the order of the resulting ADD operations at the SDAG level). llvm-svn: 206092
2014-04-12 08:59:48 +08:00
; RUN: llc < %s -mtriple=x86_64-pc-linux -addr-sink-using-gep=1 | FileCheck %s
Fix a bug in codegenprep where it was losing track of values OptimizeMemoryInst by switching to a ValueMap. Patch by Andrea DiBiagio! llvm-svn: 181397
2013-05-08 17:00:10 +08:00
; Check that the CodeGenPrepare Pass
; does not wrongly rewrite the address computed by Instruction %4
; as [12 + Base:%this].
; This test makes sure that:
; - both the store and the first load instructions
; within basic block labeled 'if.then' are not removed.
; - the store instruction stores a value at address [60 + %this]
; - the first load instruction loads a value at address [12 + %this]
%class.A = type { %struct.B }
%struct.B = type { %class.C, %class.D, %class.C, %class.D }
%class.C = type { float, float, float }
%class.D = type { [3 x %class.C] }
define linkonce_odr void @foo(%class.A* nocapture %this, i32 %BoolValue) nounwind uwtable {
entry:
%cmp = icmp eq i32 %BoolValue, 0
%address1 = getelementptr inbounds %class.A* %this, i64 0, i32 0, i32 3
%address2 = getelementptr inbounds %class.A* %this, i64 0, i32 0, i32 1
br i1 %cmp, label %if.else, label %if.then
if.then: ; preds = %entry
%0 = getelementptr inbounds %class.D* %address2, i64 0, i32 0, i64 0, i32 0
%1 = load float* %0, align 4
%2 = getelementptr inbounds float* %0, i64 3
%3 = load float* %2, align 4
%4 = getelementptr inbounds %class.D* %address1, i64 0, i32 0, i64 0, i32 0
store float %1, float* %4, align 4
br label %if.end
if.else: ; preds = %entry
br label %if.end
if.end: ; preds = %if.then, %if.else, %entry
ret void
}
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: foo:
Fix a bug in codegenprep where it was losing track of values OptimizeMemoryInst by switching to a ValueMap. Patch by Andrea DiBiagio! llvm-svn: 181397
2013-05-08 17:00:10 +08:00
; CHECK: movss 12([[THIS:%[a-zA-Z0-9]+]]), [[REGISTER:%[a-zA-Z0-9]+]]
; CHECK-NEXT: movss [[REGISTER]], 60([[THIS]])