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When expanding t2STRDi8 r, r to two stores, add kill markers correctly.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88734 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-11-14 01:50:00 +00:00
parent 3b6ced1510
commit 0cd22dd738
2 changed files with 27 additions and 0 deletions
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7
lib/Target/ARM/ARMLoadStoreOptimizer.cpp
View File

@ -866,6 +866,13 @@ bool ARMLoadStoreOpt::FixInvalidRegPairOp(MachineBasicBlock &MBB,
BaseReg, BaseKill, BaseUndef, OffReg, OffKill, OffUndef,
Pred, PredReg, TII, isT2);
} else {
if (OddReg == EvenReg && EvenDeadKill) {
// If the two source operands are the same, the kill marker is probably
// on the first one. e.g.
// t2STRDi8 %R5<kill>, %R5, %R9<kill>, 0, 14, %reg0
EvenDeadKill = false;
OddDeadKill = true;
}
InsertLDR_STR(MBB, MBBI, OffImm, isLd, dl, NewOpc,
EvenReg, EvenDeadKill, EvenUndef,
BaseReg, false, BaseUndef, OffReg, false, OffUndef,

20
test/CodeGen/Thumb2/2009-11-13-STRDBug.ll Normal file
View File

@ -0,0 +1,20 @@
; RUN: llc < %s -mtriple=thumbv7-apple-darwin10
; rdar://7394794
define arm_apcscc void @lshift_double(i64 %l1, i64 %h1, i64 %count, i32 %prec, i64* nocapture %lv, i64* nocapture %hv, i32 %arith) nounwind {
entry:
%..i = select i1 false, i64 0, i64 0 ; <i64> [#uses=1]
br i1 undef, label %bb11.i, label %bb6.i
bb6.i: ; preds = %entry
%0 = lshr i64 %h1, 0 ; <i64> [#uses=1]
store i64 %0, i64* %hv, align 4
%1 = lshr i64 %l1, 0 ; <i64> [#uses=1]
%2 = or i64 0, %1 ; <i64> [#uses=1]
store i64 %2, i64* %lv, align 4
br label %bb11.i
bb11.i: ; preds = %bb6.i, %entry
store i64 %..i, i64* %lv, align 4
ret void
}