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| author | Juergen Ributzka <juergen@apple.com> | 2014-06-13 00:45:11 +0000 |
|---|---|---|
| committer | Juergen Ributzka <juergen@apple.com> | 2014-06-13 00:45:11 +0000 |
| commit | 7f8d138f50f57144650dfba78ea0e6e168a23c54 (patch) | |
| tree | 5ef27c18e67d5dbb6b529d6a195d0751c8445b63 /test | |
| parent | f7a2d5e387de25af9711f04f253bc0e63fd988dd (diff) | |
| download | llvm-7f8d138f50f57144650dfba78ea0e6e168a23c54.tar.gz llvm-7f8d138f50f57144650dfba78ea0e6e168a23c54.tar.bz2 llvm-7f8d138f50f57144650dfba78ea0e6e168a23c54.tar.xz | |
[FastISel][X86] - Add branch weights
Add branch weights to branch instructions, so that the following passes can
optimize based on it (i.e. basic block ordering).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210863 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/fast-isel-branch_weights.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fast-isel-branch_weights.ll b/test/CodeGen/X86/fast-isel-branch_weights.ll new file mode 100644 index 0000000000..bc41395e1e --- /dev/null +++ b/test/CodeGen/X86/fast-isel-branch_weights.ll @@ -0,0 +1,19 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin10 | FileCheck %s +; RUN: llc < %s -fast-isel -fast-isel-abort -mtriple=x86_64-apple-darwin10 | FileCheck %s + +; Test if the BBs are reordred according to their branch weights. +define i64 @branch_weights_test(i64 %a, i64 %b) { +; CHECK-LABEL: branch_weights_test +; CHECK-LABEL: success +; CHECK-LABEL: fail + %1 = icmp ult i64 %a, %b + br i1 %1, label %fail, label %success, !prof !0 + +fail: + ret i64 -1 + +success: + ret i64 0 +} + +!0 = metadata !{metadata !"branch_weights", i32 0, i32 2147483647} |