Description
| Bugzilla Link | 652 |
| Resolution | FIXED |
| Resolved on | Feb 22, 2010 12:49 |
| Version | trunk |
| OS | Linux |
| Reporter | LLVM Bugzilla Contributor |
Extended Description
Legalize makes the last block mostly disappear, and that is bad.
; ModuleID = 'bugpoint.test.bc'
target endian = little
target pointersize = 64
implementation ; Functions:
bool %l5_l14_g721_encoder_then_2E_i(int %tmp.46.reload, short* %tmp.5542.out) {
newFuncRoot:
br label %then.i
cond_true.exitStub: ; preds = %then.i
store short %tmp.5542, short* %tmp.5542.out
ret bool true
cond_false.exitStub: ; preds = %then.i
store short %tmp.5542, short* %tmp.5542.out
ret bool false
then.i: ; preds = %newFuncRoot
%tmp.11.i = setne int %tmp.46.reload, 0 ; [#uses=1]
%tmp.5542 = select bool %tmp.11.i, short -32768, short 0
; [#uses=3]
%tmp.5744 = setlt short %tmp.5542, 0 ; [#uses=1]
br bool %tmp.5744, label %cond_true.exitStub, label %cond_false.exitStub
}
Gets codegened into:
newFuncRoot:
%$31 = BR mbb<then.i,0x120f11190>
cond_true.exitStub:
STW %$0, 0, %$17
%$0 = LDA 1, %$31
%$31 = RET %$26, 1
cond_false.exitStub:
STW %$0, 0, %$17
%$0 = LDA 0, %$31
%$31 = RET %$26, 1
then.i:
%$0 = LDA 0, %$31
%$31 = BR mbb<cond_false.exitStub,0x120f110d0>
then.i is clearly in bad shape.