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Fix setting weight for inverted loop condition block #74444

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Merged
BruceForstall merged 1 commit into from
Aug 23, 2022
Merged

Fix setting weight for inverted loop condition block #74444

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5 changes: 3 additions & 2 deletions src/coreclr/jit/optimizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5074,11 +5074,12 @@ bool Compiler::optInvertWhileLoop(BasicBlock* block)
//
if (allProfileWeightsAreValid)
{
// Update the weight for bTest
// Update the weight for bTest. Normally, this reduces the weight of the bTest, except in odd
// cases of stress modes with inconsistent weights.
//
JITDUMP("Reducing profile weight of " FMT_BB " from " FMT_WT " to " FMT_WT "\n", bTest->bbNum, weightTest,
weightNext);
bTest->bbWeight = weightNext;
bTest->inheritWeight(block->bbNext);

// Determine the new edge weights.
//
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