diff options
| author | Manman Ren <mren@apple.com> | 2012-09-17 23:07:43 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-09-17 23:07:43 +0000 |
| commit | b010277b599a6298b079d5ba2750df25c20c0b9d (patch) | |
| tree | 5d21dd3c9ff8efef0ca1ed23aa5a99971a092a45 /test/Transforms | |
| parent | f23ddf54eabb0b3b15c22e166e7f6ff966caafb4 (diff) | |
PGO: preserve branch-weight metadata when simplifying Switch
Hanlde the case when we split the default edge if the default target has "icmp"
and unconditinal branch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164076 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/SimplifyCFG/preserve-branchweights.ll | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/test/Transforms/SimplifyCFG/preserve-branchweights.ll b/test/Transforms/SimplifyCFG/preserve-branchweights.ll index 2347cb6d19..4b78747cb7 100644 --- a/test/Transforms/SimplifyCFG/preserve-branchweights.ll +++ b/test/Transforms/SimplifyCFG/preserve-branchweights.ll @@ -216,6 +216,40 @@ bees: ret void } +; Test edge splitting when the default target has icmp and unconditinal +; branch +define i1 @test9(i32 %x, i32 %y) nounwind { +; CHECK: @test9 +entry: + switch i32 %x, label %bees [ + i32 0, label %a + i32 1, label %end + i32 2, label %end + ], !prof !7 +; CHECK: switch i32 %x, label %bees [ +; CHECK: i32 0, label %a +; CHECK: i32 1, label %end +; CHECK: i32 2, label %end +; CHECK: i32 92, label %end +; CHECK: ], !prof !7 + +a: + call void @helper(i32 0) nounwind + %reta = icmp slt i32 %x, %y + ret i1 %reta + +bees: + %tmp = icmp eq i32 %x, 92 + br label %end + +end: +; CHECK: end: +; CHECK: %ret = phi i1 [ true, %entry ], [ false, %bees ], [ true, %entry ], [ true, %entry ] + %ret = phi i1 [ true, %entry ], [%tmp, %bees], [true, %entry] + call void @helper(i32 2) nounwind + ret i1 %ret +} + !0 = metadata !{metadata !"branch_weights", i32 3, i32 5} !1 = metadata !{metadata !"branch_weights", i32 1, i32 1} !2 = metadata !{metadata !"branch_weights", i32 1, i32 2} @@ -232,4 +266,5 @@ bees: ; CHECK: !4 = metadata !{metadata !"branch_weights", i32 11, i32 5} ; CHECK: !5 = metadata !{metadata !"branch_weights", i32 17, i32 15} ; CHECK: !6 = metadata !{metadata !"branch_weights", i32 9, i32 7} -; CHECK-NOT: !7 +; CHECK: !7 = metadata !{metadata !"branch_weights", i32 17, i32 9, i32 8, i32 7, i32 17} +; CHECK-NOT: !8 |