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| author | Chandler Carruth <chandlerc@gmail.com> | 2012-08-07 09:45:24 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2012-08-07 09:45:24 +0000 |
| commit | e6450dc2afc18531bf9b70180a9f67376d9f00c7 (patch) | |
| tree | 88d92e7932ae7528c097316ea06db60180d92d94 /test/CodeGen/X86/block-placement.ll | |
| parent | ba86b13ad9cd6a9707a954598863da1e2a9f773b (diff) | |
| download | external_llvm-e6450dc2afc18531bf9b70180a9f67376d9f00c7.zip external_llvm-e6450dc2afc18531bf9b70180a9f67376d9f00c7.tar.gz external_llvm-e6450dc2afc18531bf9b70180a9f67376d9f00c7.tar.bz2 | |
Add a much more conservative strategy for aligning branch targets.
Previously, MBP essentially aligned every branch target it could. This
bloats code quite a bit, especially non-looping code which has no real
reason to prefer aligned branch targets so heavily.
As Andy said in review, it's still a bit odd to do this without a real
cost model, but this at least has much more plausible heuristics.
Fixes PR13265.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161409 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/block-placement.ll')
| -rw-r--r-- | test/CodeGen/X86/block-placement.ll | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/test/CodeGen/X86/block-placement.ll b/test/CodeGen/X86/block-placement.ll index ab23b88..5534712 100644 --- a/test/CodeGen/X86/block-placement.ll +++ b/test/CodeGen/X86/block-placement.ll @@ -7,10 +7,15 @@ define i32 @test_ifchains(i32 %i, i32* %a, i32 %b) { ; that is not expected to run. ; CHECK: test_ifchains: ; CHECK: %entry +; CHECK-NOT: .align ; CHECK: %else1 +; CHECK-NOT: .align ; CHECK: %else2 +; CHECK-NOT: .align ; CHECK: %else3 +; CHECK-NOT: .align ; CHECK: %else4 +; CHECK-NOT: .align ; CHECK: %exit ; CHECK: %then1 ; CHECK: %then2 @@ -76,8 +81,11 @@ define i32 @test_loop_cold_blocks(i32 %i, i32* %a) { ; Check that we sink cold loop blocks after the hot loop body. ; CHECK: test_loop_cold_blocks: ; CHECK: %entry +; CHECK-NOT: .align ; CHECK: %unlikely1 +; CHECK-NOT: .align ; CHECK: %unlikely2 +; CHECK: .align ; CHECK: %body1 ; CHECK: %body2 ; CHECK: %body3 |