1
0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-01 00:12:50 +01:00
llvm-mirror/test/CodeGen/X86/2012-07-16-LeaUndef.ll
Nadav Rotem 67ff66bd0c Fix a bug in the 3-address conversion of LEA when one of the operands is an
undef virtual register. The problem is that ProcessImplicitDefs removes the
definition of the register and marks all uses as undef. If we lose the undef
marker then we get a register which has no def, is not marked as undef. The
live interval analysis does not collect information for these virtual
registers and we crash in later passes.

Together with Michael Kuperstein <michael.m.kuperstein@intel.com>

llvm-svn: 160260
2012-07-16 10:52:25 +00:00

17 lines
347 B
LLVM

; RUN: llc < %s -march=x86-64 -mcpu=corei7
define void @autogen_SD2543() {
A:
%E83 = add i32 0, 1
%E820 = add i32 0, undef
br label %C
C:
%B908 = add i32 %E83, %E820
store i32 %B908, i32* undef
%Sl2391 = select i1 undef, i32 undef, i32 %E83
%Cmp3114 = icmp ne i32 %Sl2391, undef
br i1 %Cmp3114, label %C, label %G
G:
ret void
}