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| author | Cong Hou <congh@google.com> | 2015-12-01 00:02:51 +0000 |
|---|---|---|
| committer | Cong Hou <congh@google.com> | 2015-12-01 00:02:51 +0000 |
| commit | fa1917c673aee79943eeca1319ebb6bcb0f1229f (patch) | |
| tree | 9881e2f14716710ee86910e114b3d665921bfa6f /llvm/test/CodeGen/Generic/MachineBranchProb.ll | |
| parent | e9841a6bb5fd4fac1e63255da79306454e1997a0 (diff) | |
| download | bcm5719-llvm-fa1917c673aee79943eeca1319ebb6bcb0f1229f.tar.gz bcm5719-llvm-fa1917c673aee79943eeca1319ebb6bcb0f1229f.zip | |
Replace all weight-based interfaces in MBB with probability-based interfaces, and update all uses of old interfaces.
The patch in http://reviews.llvm.org/D13745 is broken into four parts:
1. New interfaces without functional changes (http://reviews.llvm.org/D13908).
2. Use new interfaces in SelectionDAG, while in other passes treat probabilities
as weights (http://reviews.llvm.org/D14361).
3. Use new interfaces in all other passes.
4. Remove old interfaces.
This patch is 3+4 above. In this patch, MBB won't provide weight-based
interfaces any more, which are totally replaced by probability-based ones.
The interface addSuccessor() is redesigned so that the default probability is
unknown. We allow unknown probabilities but don't allow using it together
with known probabilities in successor list. That is to say, we either have a
list of successors with all known probabilities, or all unknown
probabilities. In the latter case, we assume each successor has 1/N
probability where N is the number of successors. An assertion checks if the
user is attempting to add a successor with the disallowed mixed use as stated
above. This can help us catch many misuses.
All uses of weight-based interfaces are now updated to use probability-based
ones.
Differential revision: http://reviews.llvm.org/D14973
llvm-svn: 254348
Diffstat (limited to 'llvm/test/CodeGen/Generic/MachineBranchProb.ll')
| -rw-r--r-- | llvm/test/CodeGen/Generic/MachineBranchProb.ll | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/llvm/test/CodeGen/Generic/MachineBranchProb.ll b/llvm/test/CodeGen/Generic/MachineBranchProb.ll index 5a4a4672f7e..ae3c8da2147 100644 --- a/llvm/test/CodeGen/Generic/MachineBranchProb.ll +++ b/llvm/test/CodeGen/Generic/MachineBranchProb.ll @@ -16,11 +16,11 @@ entry: i64 5, label %sw.bb1 ], !prof !0 ; CHECK: BB#0: derived from LLVM BB %entry -; CHECK: Successors according to CFG: BB#2(1616928864) BB#4(530554784) +; CHECK: Successors according to CFG: BB#2({{[0-9a-fx/= ]+}}75.29%) BB#4({{[0-9a-fx/= ]+}}24.71%) ; CHECK: BB#4: derived from LLVM BB %entry -; CHECK: Successors according to CFG: BB#1(252645135) BB#5(277909649) +; CHECK: Successors according to CFG: BB#1({{[0-9a-fx/= ]+}}47.62%) BB#5({{[0-9a-fx/= ]+}}52.38%) ; CHECK: BB#5: derived from LLVM BB %entry -; CHECK: Successors according to CFG: BB#1(101058054) BB#3(176851595) +; CHECK: Successors according to CFG: BB#1({{[0-9a-fx/= ]+}}36.36%) BB#3({{[0-9a-fx/= ]+}}63.64%) sw.bb: br label %return @@ -62,7 +62,7 @@ return: ret void ; CHECK-LABEL: Machine code for function left_leaning_weight_balanced_tree: ; CHECK: BB#0: derived from LLVM BB %entry ; CHECK-NOT: Successors -; CHECK: Successors according to CFG: BB#8(852677332) BB#9(1294806318) +; CHECK: Successors according to CFG: BB#8({{[0-9a-fx/= ]+}}39.71%) BB#9({{[0-9a-fx/= ]+}}60.29%) } !1 = !{!"branch_weights", |
