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blockfreq: Use better branch weights in multiexit test

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The branch weights were even before.  Make them different.

<rdar://problem/14292693>

llvm-svn: 207193
This commit is contained in:
Duncan P. N. Exon Smith 2014-04-25 04:38:37 +00:00
parent d2094f508a
commit 7be280eab6
1 changed files with 8 additions and 7 deletions
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15
test/Analysis/BlockFrequencyInfo/irreducible.ll
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@ -1,6 +1,7 @@
; RUN: opt < %s -analyze -block-freq | FileCheck %s
; A loop with multiple exits should be handled correctly.
; A loop with multiple exits isn't irreducible. It should be handled
; correctly.
;
; CHECK-LABEL: Printing analysis {{.*}} for function 'multiexit':
; CHECK-NEXT: block-frequency-info: multiexit
@ -9,19 +10,19 @@ define void @multiexit(i1 %x) {
entry:
br label %loop.1
; CHECK-NEXT: loop.1: float = 1.333{{3*}},
; CHECK-NEXT: loop.1: float = 2.0,
loop.1:
br i1 %x, label %exit.1, label %loop.2, !prof !0
; CHECK-NEXT: loop.2: float = 0.666{{6*7}},
; CHECK-NEXT: loop.2: float = 1.75,
loop.2:
br i1 %x, label %exit.2, label %loop.1, !prof !1
; CHECK-NEXT: exit.1: float = 0.666{{6*7}},
; CHECK-NEXT: exit.1: float = 0.25,
exit.1:
br label %return
; CHECK-NEXT: exit.2: float = 0.333{{3*}},
; CHECK-NEXT: exit.2: float = 0.75,
exit.2:
br label %return
@ -30,8 +31,8 @@ return:
ret void
}
!0 = metadata !{metadata !"branch_weights", i32 3, i32 3}
!1 = metadata !{metadata !"branch_weights", i32 5, i32 5}
!0 = metadata !{metadata !"branch_weights", i32 1, i32 7}
!1 = metadata !{metadata !"branch_weights", i32 3, i32 4}
; The current BlockFrequencyInfo algorithm doesn't handle multiple entrances
; into a loop very well. The frequencies assigned to blocks in the loop are