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| author | Manman Ren <mren@apple.com> | 2012-09-17 22:28:55 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-09-17 22:28:55 +0000 |
| commit | b11cbe6b2360cd46e12d676064e8f58a0586c9ba (patch) | |
| tree | f491ff8aae183c487c1cf32a8d684cb4561a97df /test | |
| parent | 97d552e5c71dd45e1a124e5a87550270a20a9062 (diff) | |
PGO: preserve branch-weight metadata when simplifying SwitchOnSelect.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164068 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/SimplifyCFG/preserve-branchweights.ll | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/test/Transforms/SimplifyCFG/preserve-branchweights.ll b/test/Transforms/SimplifyCFG/preserve-branchweights.ll index 98a47e8e0c..2347cb6d19 100644 --- a/test/Transforms/SimplifyCFG/preserve-branchweights.ll +++ b/test/Transforms/SimplifyCFG/preserve-branchweights.ll @@ -193,6 +193,29 @@ Z: ret void } +; Test basic folding to a conditional branch. +define void @test8(i64 %x, i64 %y) nounwind { +; CHECK: @test8 +entry: + %lt = icmp slt i64 %x, %y +; CHECK: br i1 %lt, label %a, label %b, !prof !6 + %qux = select i1 %lt, i32 0, i32 2 + switch i32 %qux, label %bees [ + i32 0, label %a + i32 1, label %b + i32 2, label %b + ], !prof !7 +a: + call void @helper(i32 0) nounwind + ret void +b: + call void @helper(i32 1) nounwind + ret void +bees: + call void @helper(i32 2) nounwind + ret void +} + !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} @@ -200,6 +223,7 @@ Z: !4 = metadata !{metadata !"branch_weights", i32 4, i32 3, i32 2, i32 1} !5 = metadata !{metadata !"branch_weights", i32 7, i32 6, i32 5} !6 = metadata !{metadata !"branch_weights", i32 1, i32 3} +!7 = metadata !{metadata !"branch_weights", i32 33, i32 9, i32 8, i32 7} ; CHECK: !0 = metadata !{metadata !"branch_weights", i32 5, i32 11} ; CHECK: !1 = metadata !{metadata !"branch_weights", i32 1, i32 5} @@ -207,4 +231,5 @@ Z: ; CHECK: !3 = metadata !{metadata !"branch_weights", i32 49, i32 12, i32 24, i32 35} ; CHECK: !4 = metadata !{metadata !"branch_weights", i32 11, i32 5} ; CHECK: !5 = metadata !{metadata !"branch_weights", i32 17, i32 15} -; CHECK-NOT: !6 +; CHECK: !6 = metadata !{metadata !"branch_weights", i32 9, i32 7} +; CHECK-NOT: !7 |