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[Hexagon] Packetize return value setup with the return instruction

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Commit r279241 unintentionally reverted that ability.

llvm-svn: 279526
This commit is contained in:
Krzysztof Parzyszek 2016-08-23 16:01:01 +00:00
parent af8f6ba1d3
commit e2ff2bde18
2 changed files with 41 additions and 3 deletions
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7
lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
View File

@ -339,7 +339,8 @@ bool HexagonPacketizerList::isNewifiable(const MachineInstr &MI,
if (NewRC == &Hexagon::PredRegsRegClass)
if (HII->isV60VectorInstruction(MI) && MI.mayStore())
return false;
return HII->isCondInst(MI) || HII->isJumpR(MI) || HII->mayBeNewStore(MI);
return HII->isCondInst(MI) || HII->isJumpR(MI) || MI.isReturn() ||
HII->mayBeNewStore(MI);
}
// Promote an instructiont to its .cur form.
@ -805,7 +806,7 @@ bool HexagonPacketizerList::canPromoteToDotNew(const MachineInstr &MI,
// predicate .new
if (RC == &Hexagon::PredRegsRegClass)
if (HII->isCondInst(MI) || HII->isJumpR(MI))
if (HII->isCondInst(MI) || HII->isJumpR(MI) || MI.isReturn())
return HII->predCanBeUsedAsDotNew(PI, DepReg);
if (RC != &Hexagon::PredRegsRegClass && !HII->mayBeNewStore(MI))
@ -1307,7 +1308,7 @@ bool HexagonPacketizerList::isLegalToPacketizeTogether(SUnit *SUI, SUnit *SUJ) {
RC = HRI->getMinimalPhysRegClass(DepReg);
}
if (I.isCall() || HII->isJumpR(I) || HII->isTailCall(I)) {
if (I.isCall() || HII->isJumpR(I) || I.isReturn() || HII->isTailCall(I)) {
if (!isRegDependence(DepType))
continue;
if (!isCallDependent(I, DepType, SUJ->Succs[i].getReg()))

37
test/CodeGen/Hexagon/packetize-return-arg.ll Normal file
View File

@ -0,0 +1,37 @@
; RUN: llc -march=hexagon < %s | FileCheck %s
; Check that "r0 = rN" is packetized together with dealloc_return.
; CHECK: r0 = r
; CHECK-NOT: {
; CHECK: dealloc_return
target triple = "hexagon-unknown--elf"
; Function Attrs: nounwind
define i8* @fred(i8* %user_context, i32 %x) #0 {
entry:
%and14 = add i32 %x, 255
%add1 = and i32 %and14, -128
%call = tail call i8* @malloc(i32 %add1) #1
%cmp = icmp eq i8* %call, null
br i1 %cmp, label %cleanup, label %if.end
if.end: ; preds = %entry
%0 = ptrtoint i8* %call to i32
%sub4 = add i32 %0, 131
%and5 = and i32 %sub4, -128
%1 = inttoptr i32 %and5 to i8*
%2 = inttoptr i32 %and5 to i8**
%arrayidx = getelementptr inbounds i8*, i8** %2, i32 -1
store i8* %call, i8** %arrayidx, align 4
br label %cleanup
cleanup: ; preds = %if.end, %entry
%retval.0 = phi i8* [ %1, %if.end ], [ null, %entry ]
ret i8* %retval.0
}
; Function Attrs: nounwind
declare noalias i8* @malloc(i32) local_unnamed_addr #1
attributes #0 = { nounwind }
attributes #1 = { nobuiltin nounwind }