mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-17 05:29:24 +00:00
Fix PR2783 - coalescer bug. Missing a TargetRegisterInfo::isVirtualRegister check.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56112 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
ffeecd65e3
commit
4086906a0f
@ -1319,7 +1319,8 @@ bool SimpleRegisterCoalescing::JoinCopy(CopyRec &TheCopy, bool &Again) {
|
||||
|
||||
// If resulting interval has a preference that no longer fits because of subreg
|
||||
// coalescing, just clear the preference.
|
||||
if (ResDstInt->preference && (isExtSubReg || isInsSubReg)) {
|
||||
if (ResDstInt->preference && (isExtSubReg || isInsSubReg) &&
|
||||
TargetRegisterInfo::isVirtualRegister(ResDstInt->reg)) {
|
||||
const TargetRegisterClass *RC = mri_->getRegClass(ResDstInt->reg);
|
||||
if (!RC->contains(ResDstInt->preference))
|
||||
ResDstInt->preference = 0;
|
||||
|
38
test/CodeGen/X86/2008-09-11-CoalescerBug.ll
Normal file
38
test/CodeGen/X86/2008-09-11-CoalescerBug.ll
Normal file
@ -0,0 +1,38 @@
|
||||
; RUN: llvm-as < %s | llc -march=x86
|
||||
; PR2783
|
||||
|
||||
@g_15 = external global i16 ; <i16*> [#uses=2]
|
||||
|
||||
define i32 @func_3(i32 %p_5) nounwind {
|
||||
entry:
|
||||
%0 = srem i32 1, 0 ; <i32> [#uses=2]
|
||||
%1 = load i16* @g_15, align 2 ; <i16> [#uses=1]
|
||||
%2 = zext i16 %1 to i32 ; <i32> [#uses=1]
|
||||
%3 = and i32 %2, 1 ; <i32> [#uses=1]
|
||||
%4 = tail call i32 (...)* @rshift_u_s( i32 1 ) nounwind ; <i32> [#uses=1]
|
||||
%5 = icmp slt i32 %4, 2 ; <i1> [#uses=1]
|
||||
%6 = zext i1 %5 to i32 ; <i32> [#uses=1]
|
||||
%7 = icmp sge i32 %3, %6 ; <i1> [#uses=1]
|
||||
%8 = zext i1 %7 to i32 ; <i32> [#uses=1]
|
||||
%9 = load i16* @g_15, align 2 ; <i16> [#uses=1]
|
||||
%10 = icmp eq i16 %9, 0 ; <i1> [#uses=1]
|
||||
%11 = zext i1 %10 to i32 ; <i32> [#uses=1]
|
||||
%12 = tail call i32 (...)* @func_20( i32 1 ) nounwind ; <i32> [#uses=1]
|
||||
%13 = icmp sge i32 %11, %12 ; <i1> [#uses=1]
|
||||
%14 = zext i1 %13 to i32 ; <i32> [#uses=1]
|
||||
%15 = sub i32 %8, %14 ; <i32> [#uses=1]
|
||||
%16 = icmp ult i32 %15, 2 ; <i1> [#uses=1]
|
||||
%17 = zext i1 %16 to i32 ; <i32> [#uses=1]
|
||||
%18 = icmp ugt i32 %0, 3 ; <i1> [#uses=1]
|
||||
%or.cond = or i1 false, %18 ; <i1> [#uses=1]
|
||||
%19 = select i1 %or.cond, i32 0, i32 %0 ; <i32> [#uses=1]
|
||||
%.0 = lshr i32 %17, %19 ; <i32> [#uses=1]
|
||||
%20 = tail call i32 (...)* @func_7( i32 %.0 ) nounwind ; <i32> [#uses=0]
|
||||
ret i32 undef
|
||||
}
|
||||
|
||||
declare i32 @rshift_u_s(...)
|
||||
|
||||
declare i32 @func_20(...)
|
||||
|
||||
declare i32 @func_7(...)
|
Loading…
Reference in New Issue
Block a user