mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-02 07:11:49 +00:00
26 lines
748 B
LLVM
26 lines
748 B
LLVM
|
; When constant propogating terminator instructions, the basic block iterator
|
||
|
|
; was not updated to refer to the final position of the new terminator. This
|
||
|
|
; can be bad, f.e. because constproping a terminator can lead to the
|
||
|
|
; destruction of PHI nodes, which invalidates the iterator!
|
||
|
|
;
|
||
|
|
; Fixed by adding new arguments to ConstantFoldTerminator
|
||
|
|
;
|
||
|
|
; RUN: as < %s | opt -constprop
|
||
|
|
|
||
|
|
implementation
|
||
|
|
|
||
|
|
void "build_tree"(int %ml)
|
||
|
|
begin
|
||
|
|
br label %bb2
|
||
|
|
|
||
|
|
bb2:
|
||
|
|
%reg137 = phi int [ %reg140, %bb2 ], [ 12, %0 ] ; <int> [#uses=2]
|
||
|
|
%reg138 = phi uint [ %reg139, %bb2 ], [ 0, %0 ] ; <uint> [#uses=3]
|
||
|
|
%reg139 = add uint %reg138, 1 ; <uint> [#uses=1]
|
||
|
|
%reg140 = add int %reg137, -1 ; <int> [#uses=1]
|
||
|
|
br bool false, label %bb2, label %bb3
|
||
|
|
|
||
|
|
bb3:
|
||
|
|
ret void
|
||
|
|
end
|