mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 18:29:46 +00:00
Fix PR9960 by teaching SimpleRegisterCoalescing::AdjustCopiesBackFrom() to preserve
the phikill flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131717 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
074397d75e
commit
21a70bf4a5
@ -252,7 +252,12 @@ bool SimpleRegisterCoalescing::AdjustCopiesBackFrom(const CoalescerPair &CP,
|
||||
|
||||
// Okay, merge "B1" into the same value number as "B0".
|
||||
if (BValNo != ValLR->valno) {
|
||||
// If B1 is killed by a PHI, then the merged live range must also be killed
|
||||
// by the same PHI, as B0 and B1 can not overlap.
|
||||
bool HasPHIKill = BValNo->hasPHIKill();
|
||||
IntB.MergeValueNumberInto(BValNo, ValLR->valno);
|
||||
if (HasPHIKill)
|
||||
ValLR->valno->setHasPHIKill(true);
|
||||
}
|
||||
DEBUG({
|
||||
dbgs() << " result = ";
|
||||
|
31
test/CodeGen/X86/2011-06-19-QuicksortCoalescerBug.ll
Normal file
31
test/CodeGen/X86/2011-06-19-QuicksortCoalescerBug.ll
Normal file
@ -0,0 +1,31 @@
|
||||
; RUN: llc < %s -verify-coalescing
|
||||
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
|
||||
target triple = "x86_64-apple-macosx10.7.0"
|
||||
|
||||
define void @Quicksort(i32* %a, i32 %l, i32 %r) nounwind ssp {
|
||||
entry:
|
||||
br label %tailrecurse
|
||||
|
||||
tailrecurse: ; preds = %do.cond, %entry
|
||||
%l.tr = phi i32 [ %l, %entry ], [ %i.1, %do.cond ]
|
||||
%r.tr = phi i32 [ %r, %entry ], [ %l.tr, %do.cond ]
|
||||
%idxprom12 = sext i32 %r.tr to i64
|
||||
%arrayidx14 = getelementptr inbounds i32* %a, i64 %idxprom12
|
||||
br label %do.body
|
||||
|
||||
do.body: ; preds = %do.cond, %tailrecurse
|
||||
%i.0 = phi i32 [ %l.tr, %tailrecurse ], [ %i.1, %do.cond ]
|
||||
%add7 = add nsw i32 %i.0, 1
|
||||
%cmp = icmp sgt i32 %add7, %r.tr
|
||||
br i1 %cmp, label %do.cond, label %if.then
|
||||
|
||||
if.then: ; preds = %do.body
|
||||
store i32 %add7, i32* %arrayidx14, align 4
|
||||
%add16 = add i32 %i.0, 2
|
||||
br label %do.cond
|
||||
|
||||
do.cond: ; preds = %do.body, %if.then
|
||||
%i.1 = phi i32 [ %add16, %if.then ], [ %add7, %do.body ]
|
||||
%cmp19 = icmp sgt i32 %i.1, %r.tr
|
||||
br i1 %cmp19, label %tailrecurse, label %do.body
|
||||
}
|
Loading…
Reference in New Issue
Block a user