mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-28 14:32:51 +01:00
28 lines
625 B
LLVM
28 lines
625 B
LLVM
; This testcase tests for a problem where LICM hoists
|
|
; potentially trapping instructions when they are not guaranteed to execute.
|
|
;
|
|
; RUN: llvm-as < %s | opt -licm | llvm-dis | %prcontext "IfUnEqual" 2 | grep div
|
|
|
|
%X = global int 0
|
|
declare void %foo()
|
|
|
|
int %test(bool %c) {
|
|
%A = load int *%X
|
|
br label %Loop
|
|
Loop:
|
|
call void %foo()
|
|
br bool %c, label %LoopTail, label %IfUnEqual
|
|
|
|
IfUnEqual:
|
|
%B1 = div int 4, %A ;; Should not hoist this div!
|
|
br label %LoopTail
|
|
|
|
LoopTail:
|
|
%B = phi int [ 0, %Loop ], [ %B1, %IfUnEqual]
|
|
br bool %c, label %Loop, label %Out
|
|
|
|
Out:
|
|
%C = sub int %A, %B
|
|
ret int %C
|
|
}
|