gvnpre: segmentation fault #3781
Description
| Bugzilla Link | 3409 |
| Resolution | WONTFIX |
| Resolved on | Apr 22, 2009 05:15 |
| Version | trunk |
| OS | Linux |
| Attachments | test case |
| Reporter | LLVM Bugzilla Contributor |
Extended Description
Running "opt bugpoint-reduced-simplified.bc -gvnpre" on the attached bitcode file causes a segmentation fault.
Here's the bitcode disassembled:
; ModuleID = 'bugpoint-reduced-simplified.bc'
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"
target triple = "x86_64-unknown-linux-gnu"
define i32 @base2flt1(i32 %e) nounwind readnone {
entry:
br i1 false, label %entry.bb12_crit_edge, label %bb1
entry.bb12_crit_edge: ; preds = %entry
unreachable
bb1: ; preds = %entry
br i1 false, label %bb1.bb10_crit_edge, label %bb1.bb2_crit_edge
bb1.bb2_crit_edge: ; preds = %bb1
br label %bb2
bb1.bb10_crit_edge: ; preds = %bb1
unreachable
bb2: ; preds = %bb4.bb2_crit_edge, %bb1.bb2_crit_edge
br i1 false, label %bb4, label %bb2.bb12_crit_edge
bb2.bb12_crit_edge: ; preds = %bb2
br label %bb12
bb4: ; preds = %bb2
br i1 false, label %bb4.bb11_crit_edge, label %bb4.bb2_crit_edge
bb4.bb2_crit_edge: ; preds = %bb4
br label %bb2
bb4.bb11_crit_edge: ; preds = %bb4
br label %bb11
bb7: ; preds = %bb10
br i1 false, label %bb7.bb12_crit_edge, label %bb9
bb7.bb12_crit_edge: ; preds = %bb7
br label %bb12
bb9: ; preds = %bb7
%0 = lshr i32 %0, 1 ; [#uses=2]
br label %bb10
bb10: ; preds = %bb9
br i1 false, label %bb7, label %bb10.bb11_crit_edge
bb10.bb11_crit_edge: ; preds = %bb10
br label %bb11
bb11: ; preds = %bb10.bb11_crit_edge, %bb4.bb11_crit_edge
%m_addr.1 = phi i32 [ 0, %bb4.bb11_crit_edge ], [ %0, %bb10.bb11_crit_edge ] ; [#uses=1]
%1 = and i32 %m_addr.1, -16777217 ; [#uses=0]
br label %UnifiedReturnBlock
bb12: ; preds = %bb7.bb12_crit_edge, %bb2.bb12_crit_edge
br label %UnifiedReturnBlock