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Fix pointer info on PPC byval stores

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For PPC64 SVR (and Darwin), the stores that take byval aggregate parameters
from registers into the stack frame had MachinePointerInfo objects with
incorrect offsets. These offsets are relative to the object itself, not to the
stack frame base.

This fixes self hosting on PPC64 when compiling with -enable-aa-sched-mi.

llvm-svn: 199763
This commit is contained in:
Hal Finkel 2014-01-21 20:15:58 +00:00
parent 12926dc854
commit ca5b9beeb1
2 changed files with 22 additions and 6 deletions
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11
lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -2335,7 +2335,7 @@ PPCTargetLowering::LowerFormalArguments_64SVR4(
EVT ObjType = (ObjSize == 1 ? MVT::i8 :
(ObjSize == 2 ? MVT::i16 : MVT::i32));
Store = DAG.getTruncStore(Val.getValue(1), dl, Val, FIN,
MachinePointerInfo(FuncArg, CurArgOffset),
MachinePointerInfo(FuncArg),
ObjType, false, false, 0);
} else {
// For sizes that don't fit a truncating store (3, 5, 6, 7),
@ -2347,7 +2347,7 @@ PPCTargetLowering::LowerFormalArguments_64SVR4(
int FI = MFI->CreateFixedObject(PtrByteSize, ArgOffset, true);
SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
MachinePointerInfo(FuncArg, ArgOffset),
MachinePointerInfo(FuncArg),
false, false, 0);
}
@ -2371,7 +2371,7 @@ PPCTargetLowering::LowerFormalArguments_64SVR4(
SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
MachinePointerInfo(FuncArg, ArgOffset),
MachinePointerInfo(FuncArg, j),
false, false, 0);
MemOps.push_back(Store);
++GPR_idx;
@ -2667,8 +2667,7 @@ PPCTargetLowering::LowerFormalArguments_Darwin(
SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
EVT ObjType = ObjSize == 1 ? MVT::i8 : MVT::i16;
SDValue Store = DAG.getTruncStore(Val.getValue(1), dl, Val, FIN,
MachinePointerInfo(FuncArg,
CurArgOffset),
MachinePointerInfo(FuncArg),
ObjType, false, false, 0);
MemOps.push_back(Store);
++GPR_idx;
@ -2692,7 +2691,7 @@ PPCTargetLowering::LowerFormalArguments_Darwin(
SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
MachinePointerInfo(FuncArg, ArgOffset),
MachinePointerInfo(FuncArg, j),
false, false, 0);
MemOps.push_back(Store);
++GPR_idx;

17
test/CodeGen/PowerPC/byval-agg-info.ll Normal file
View File

@ -0,0 +1,17 @@
; RUN: llc < %s -print-after=prologepilog >%t 2>&1 && FileCheck <%t %s
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
%struct.anon = type { i32, i32 }
declare void @foo(%struct.anon* %v)
define void @test(i32 %a, i32 %b, %struct.anon* byval nocapture %v) {
entry:
call void @foo(%struct.anon* %v)
ret void
}
; Make sure that the MMO on the store has no offset from the byval
; variable itself (we used to have mem:ST8[%v+64]).
; CHECK: STD %X5<kill>, 176, %X1; mem:ST8[%v](align=16)