2011-05-26-BranchKillsVreg.ll
1.53 KB
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; RUN: llc < %s -verify-coalescing
; PR10046
;
; PHI elimination splits the critical edge from %while.end415 to %if.end427.
; This requires updating the BNE-J terminators to a BEQ. The BNE instruction
; kills a virtual register, and LiveVariables must be updated with the new kill
; instruction.
target datalayout = "E-p:32:32:32-i1:8:8-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-n32"
target triple = "mips-ellcc-linux"
define i32 @mergesort(i8* %base, i32 %nmemb, i32 %size, i32 (i8*, i8*)* nocapture %cmp) nounwind {
entry:
br i1 undef, label %return, label %if.end13
if.end13: ; preds = %entry
br label %while.body
while.body: ; preds = %while.body, %if.end13
%list1.0482 = phi i8* [ %base, %if.end13 ], [ null, %while.body ]
br i1 undef, label %while.end415, label %while.body
while.end415: ; preds = %while.body
br i1 undef, label %if.then419, label %if.end427
if.then419: ; preds = %while.end415
%call425 = tail call i8* @memmove(i8* %list1.0482, i8* undef, i32 undef) nounwind
br label %if.end427
if.end427: ; preds = %if.then419, %while.end415
%list2.1 = phi i8* [ undef, %if.then419 ], [ %list1.0482, %while.end415 ]
tail call void @free(i8* %list2.1)
unreachable
return: ; preds = %entry
ret i32 -1
}
declare i8* @memmove(i8*, i8*, i32)
declare void @free(i8*)