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Fix PR3124: overly strict assert.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60392 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-12-02 02:15:36 +00:00
parent 221cd2f081
commit bbe4105cd7
2 changed files with 19 additions and 2 deletions
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6
lib/CodeGen/VirtRegMap.cpp
View File

@ -1760,8 +1760,10 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM) {
SmallVector<unsigned, 2> KillRegs;
InvalidateKills(MI, RegKills, KillOps, &KillRegs);
if (MO.isDead() && !KillRegs.empty()) {
// Source register or an implicit super-register use is killed.
assert(KillRegs[0] == Dst || TRI->isSubRegister(KillRegs[0], Dst));
// Source register or an implicit super/sub-register use is killed.
assert(KillRegs[0] == Dst ||
TRI->isSubRegister(KillRegs[0], Dst) ||
TRI->isSuperRegister(KillRegs[0], Dst));
// Last def is now dead.
TransferDeadness(&MBB, Dist, Src, RegKills, KillOps);
}

15
test/CodeGen/X86/2008-12-01-SpillerAssert.ll Normal file
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@ -0,0 +1,15 @@
; RUN: llvm-as < %s | llc -mtriple=x86_64-unknown-linux-gnu
; PR3124
%struct.cpuinfo_x86 = type { i8, i8, i8, i8, i32, i8, i8, i8, i32, i32, [9 x i32], [16 x i8], [64 x i8], i32, i32, i32, i64, %struct.cpumask_t, i16, i16, i16, i16, i16, i16, i16, i16, i32 }
%struct.cpumask_t = type { [1 x i64] }
@.str10 = external constant [70 x i8] ; <[70 x i8]*> [#uses=1]
declare i32 @printk(i8*, ...)
define void @display_cacheinfo(%struct.cpuinfo_x86* %c) nounwind section ".cpuinit.text" {
entry:
%asmtmp = tail call { i32, i32, i32, i32 } asm "cpuid", "={ax},={bx},={cx},={dx},0,2,~{dirflag},~{fpsr},~{flags}"(i32 -2147483643, i32 0) nounwind ; <{ i32, i32, i32, i32 }> [#uses=0]
%0 = tail call i32 (i8*, ...)* @printk(i8* getelementptr ([70 x i8]* @.str10, i32 0, i64 0), i32 0, i32 0, i32 0, i32 0) nounwind ; <i32> [#uses=0]
unreachable
}