1
0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-30 23:42:52 +01:00
llvm-mirror/test/Transforms/SimplifyCFG/preserve-branchweights-partial.ll
Andrew Trick 822cf12e93 Remove an incorrect assert during branch weight propagation.
Patch and test case by Alastair Murray!

llvm-svn: 163437
2012-09-08 00:07:26 +00:00

38 lines
1.0 KiB
LLVM

; RUN: opt -simplifycfg -S -o - < %s | FileCheck %s
; This test case was written to trigger an incorrect assert statement in
; -simplifycfg. Thus we don't actually want to check the output, just that
; -simplifycfg ran successfully. Thus we only check that the function still
; exists, and that it still calls foo().
;
; NOTE: There are some obviously dead blocks and missing branch weight
; metadata. Both of these features were key to triggering the assert.
; Additionally, the not-taken weight of the branch with a weight had to
; be 0 to trigger the assert.
declare void @foo() nounwind uwtable
define void @func(i32 %A) nounwind uwtable {
; CHECK: define void @func
entry:
%cmp11 = icmp eq i32 %A, 1
br i1 %cmp11, label %if.then, label %if.else, !prof !0
if.then:
call void @foo()
; CHECK: call void @foo()
br label %if.else
if.else:
%cmp17 = icmp eq i32 %A, 2
br i1 %cmp17, label %if.then2, label %if.end
if.then2:
br label %if.end
if.end:
ret void
}
!0 = metadata !{metadata !"branch_weights", i32 1, i32 0}