Date: Tue, 28 Jul 2026 07:20:05 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 297112] Please cherry-pick b23ba298 to CURRENT to fix math/p5-PDL on powerpc64le with IEEE ldbl Message-ID: <bug-297112-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=297112 Bug ID: 297112 Summary: Please cherry-pick b23ba298 to CURRENT to fix math/p5-PDL on powerpc64le with IEEE ldbl Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: pkubaj@FreeBSD.org On powerpc64le with IEEE-128 long double, clang aborts while compiling ports that test a long double for NaN -- e.g. math/p5-PDL's anyval_isbad: Assertion failed: (Legalized && "Can't legalize BR_CC with legal condition!"), function ExpandNode, LegalizeDAG.cpp At -O2 the source pattern "fcmp uno x, 0.0 || fcmp uno y, 0.0" is left as two unordered f128 compares feeding a logical or. SelectionDAG lowers that to a SETCC + BrCond which the PowerPC legalizer turns into an illegal f128 BR_CC it cannot expand, hence the assert. Upstream b23ba298 teaches InstCombine to fold the pair into a single "fcmp uno x, y" (freezing the second operand for poison safety), so the optimizer no longer emits the crashing shape. The PowerPC backend legalizer bug itself remains latent. -- You are receiving this mail because: You are the assignee for the bug.home | help
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