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Add Debug() statement to report on if stmt cost/safety test results.

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Matt Pharr
2012-03-22 13:27:26 -07:00
parent 20044f5749
commit 88cd5584e8
1 changed files with 4 additions and 0 deletions
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4
stmt.cpp
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@@ -541,6 +541,10 @@ IfStmt::emitVaryingIf(FunctionEmitContext *ctx, llvm::Value *ltest) const {
bool safeToRunWithAllLanesOff = (SafeToRunWithMaskAllOff(trueStmts) && bool safeToRunWithAllLanesOff = (SafeToRunWithMaskAllOff(trueStmts) &&
SafeToRunWithMaskAllOff(falseStmts)); SafeToRunWithMaskAllOff(falseStmts));
Debug(pos, "If statement: true cost %d (safe %d), false cost %d (safe %d).",
::EstimateCost(trueStmts), (int)SafeToRunWithMaskAllOff(trueStmts),
::EstimateCost(falseStmts), (int)SafeToRunWithMaskAllOff(falseStmts));
if (safeToRunWithAllLanesOff && if (safeToRunWithAllLanesOff &&
(costIsAcceptable || g->opt.disableCoherentControlFlow)) { (costIsAcceptable || g->opt.disableCoherentControlFlow)) {
ctx->StartVaryingIf(oldMask); ctx->StartVaryingIf(oldMask);