bb6497ffa6
When using `BranchProbabilityPrinterPass`, if a BB has no name, we get pretty unusable information like `edge -> has probability...` (i.e. we have no idea what the vertices of that edge are). This patch uses `printAsOperand`, which uses the same naming scheme as `Function::dump`, so for example during debugging sessions, the IR obtained from a function and the names used by `BranchProbabilityPrinterPass` will match. A shortcoming is that `printAsOperand` will result in the numbering algorithm re-running for every edge and every vertex (when `BranchProbabilityPrinterPass` is run on a function). If, for the given scenario, this is a problem, we can revisit this subsequently. Another nuance is that the entry basic block will be numbered, which may be slightly confusing when it's anonymous, but it's easily identifiable - the first edge would have it as source (and the number should be easily recognizable)
42 lines
1.1 KiB
LLVM
42 lines
1.1 KiB
LLVM
; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
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; This function tests the floating point unorder comparison. The probability
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; of NaN should be extremely small.
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; CHECK: Printing analysis {{.*}} for function 'uno'
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; CHECK: edge %0 -> %a probability is 0x00000800 / 0x80000000 = 0.00%
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; CHECK: edge %0 -> %b probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
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define void @uno(float %val1, float %val2) {
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%cond = fcmp uno float %val1, %val2
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br i1 %cond, label %a, label %b
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a:
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call void @fa()
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ret void
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b:
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call void @fb()
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ret void
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}
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; This function tests the floating point order comparison.
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; CHECK: Printing analysis {{.*}} for function 'ord'
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; CHECK: edge %0 -> %a probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
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; CHECK: edge %0 -> %b probability is 0x00000800 / 0x80000000 = 0.00%
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define void @ord(float %val1, float %val2) {
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%cond = fcmp ord float %val1, %val2
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br i1 %cond, label %a, label %b
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a:
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call void @fa()
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ret void
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b:
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call void @fb()
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ret void
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}
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declare void @fa()
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declare void @fb()
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