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| author | Sanjay Patel <spatel@rotateright.com> | 2016-04-30 00:12:54 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2016-04-30 00:12:54 +0000 |
| commit | bc6fad0bdf7d2dc0b53fa1a452633172c1035f2c (patch) | |
| tree | 4e5017375953e4d48511abce328cb7dad91f0559 /llvm/test | |
| parent | 5b407543c092910482bc9abf7451ac68b95213e7 (diff) | |
| download | bcm5719-llvm-bc6fad0bdf7d2dc0b53fa1a452633172c1035f2c.tar.gz bcm5719-llvm-bc6fad0bdf7d2dc0b53fa1a452633172c1035f2c.zip | |
add minimal test to show dropped metadata
llvm-svn: 268141
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Transforms/SimplifyCFG/preserve-branchweights.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SimplifyCFG/preserve-branchweights.ll b/llvm/test/Transforms/SimplifyCFG/preserve-branchweights.ll index 21738961b06..ae32809395e 100644 --- a/llvm/test/Transforms/SimplifyCFG/preserve-branchweights.ll +++ b/llvm/test/Transforms/SimplifyCFG/preserve-branchweights.ll @@ -1,3 +1,4 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -simplifycfg -S -o - < %s | FileCheck %s declare void @helper(i32) @@ -411,6 +412,32 @@ return: ret i32 %retval.0 } +; The 1st select should have branch weights equal to the 1st branch. +; The 2nd select should have freshly calculated branch weights. + +define i32 @SimplifyCondBranchToCondBranch(i1 %cmpa, i1 %cmpb) { +; CHECK-LABEL: @SimplifyCondBranchToCondBranch( +; CHECK-NEXT: block1: +; CHECK-NEXT: [[BRMERGE:%.*]] = or i1 %cmpb, %cmpa +; CHECK-NEXT: [[DOTMUX:%.*]] = select i1 %cmpb, i32 0, i32 2 +; CHECK-NEXT: [[OUTVAL:%.*]] = select i1 [[BRMERGE]], i32 [[DOTMUX]], i32 1, !prof !12 +; CHECK-NEXT: ret i32 [[OUTVAL]] +; +block1: + br i1 %cmpb, label %block3, label %block2, !prof !0 + +block2: + br i1 %cmpa, label %block3, label %exit, !prof !2 + +block3: + %cowval = phi i32 [ 2, %block2 ], [ 0, %block1 ] + br label %exit + +exit: + %outval = phi i32 [ %cowval, %block3 ], [ 1, %block2 ] + ret i32 %outval +} + !0 = !{!"branch_weights", i32 3, i32 5} !1 = !{!"branch_weights", i32 1, i32 1} @@ -440,4 +467,5 @@ return: ;; treat the weight as an unsigned integer. ; CHECK: !10 = !{!"branch_weights", i32 112017436, i32 -735157296} ; CHECK: !11 = !{!"branch_weights", i32 3, i32 5} +; CHECK: !12 = !{!"branch_weights", i32 14, i32 10} |
