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Fix PR10029 - VerifyCoalescing failure on patterns_dfa.c of 445.gobmk.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132181 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich 2011-05-27 05:04:51 +00:00
parent 3a5d7d0665
commit f031d0977f
2 changed files with 58 additions and 2 deletions
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7
lib/CodeGen/UnreachableBlockElim.cpp
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@ -196,8 +196,11 @@ bool UnreachableMachineBlockElim::runOnMachineFunction(MachineFunction &F) {
temp->eraseFromParent();
ModifiedPHI = true;
if (Input != Output)
F.getRegInfo().replaceRegWith(Output, Input);
if (Input != Output) {
MachineRegisterInfo &MRI = F.getRegInfo();
MRI.constrainRegClass(Input, MRI.getRegClass(Output));
MRI.replaceRegWith(Output, Input);
}
continue;
}

53
test/CodeGen/X86/2011-05-26-UnreachableBlockElim.ll Normal file
View File

@ -0,0 +1,53 @@
; 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-macosx10.6.0"
%struct.attrib = type { i32, i32 }
%struct.dfa = type { [80 x i8], i32, %struct.state*, i32, i32, %struct.attrib*, i32, i32 }
%struct.state = type { i32, [4 x i32] }
@aux_temp = external global %struct.dfa, align 8
declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readnone
declare void @__memset_chk() nounwind
define void @dfa_add_string() nounwind uwtable ssp {
entry:
br label %if.end.i
if.end.i: ; preds = %entry
%idxprom.i = add i64 0, 1
br i1 undef, label %land.end.thread.i, label %land.end.i
land.end.thread.i: ; preds = %if.end.i
%0 = call i64 @llvm.objectsize.i64(i8* undef, i1 false) nounwind
%cmp1710.i = icmp eq i64 %0, -1
br i1 %cmp1710.i, label %cond.false156.i, label %cond.true138.i
land.end.i: ; preds = %if.end.i
%1 = call i64 @llvm.objectsize.i64(i8* undef, i1 false) nounwind
%cmp17.i = icmp eq i64 %1, -1
br i1 %cmp17.i, label %cond.false156.i, label %cond.true138.i
cond.true138.i: ; preds = %for.end.i, %land.end.thread.i
call void @__memset_chk() nounwind
br label %cond.end166.i
cond.false156.i: ; preds = %for.end.i, %land.end.thread.i
%idxprom1114.i = phi i64 [ undef, %land.end.thread.i ], [ %idxprom.i, %land.end.i ]
call void @__memset_chk() nounwind
br label %cond.end166.i
cond.end166.i: ; preds = %cond.false156.i, %cond.true138.i
%idxprom1113.i = phi i64 [ %idxprom1114.i, %cond.false156.i ], [ undef, %cond.true138.i ]
%tmp235.i = load %struct.state** getelementptr inbounds (%struct.dfa* @aux_temp, i64 0, i32 2), align 8, !tbaa !0
%att.i = getelementptr inbounds %struct.state* %tmp235.i, i64 %idxprom1113.i, i32 0
store i32 0, i32* %att.i, align 4, !tbaa !3
ret void
}
!0 = metadata !{metadata !"any pointer", metadata !1}
!1 = metadata !{metadata !"omnipotent char", metadata !2}
!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
!3 = metadata !{metadata !"int", metadata !1}