================
@@ -580,11 +580,13 @@ void ARMPassConfig::addPreSched2() {
void ARMPassConfig::addPreEmitPass() {
addPass(createThumb2SizeReductionPass());
- // Always unpack bundles for:
+ // Unpack bundles for:
// - Thumb2: Constant island pass requires unbundled instructions
// - KCFI: KCFI_CHECK pseudo instructions need to be unbundled for AsmPrinter
- // - CT_SELECT: Post-RA expansion creates bundles that must be unpacked
- addPass(createUnpackMachineBundlesLegacy(nullptr));
----------------
tbizetst wrote:
With that change, BUNDLE pseudo-instructions are no longer unpacked on Thumb-1
. The generated code for CT_SELECT is then incomplete.
It looks like an inadvertent revert of the changes introduced by "[LLVM][ARM]
Add native ct.select support for ARM32 and Thumb." Re-enabling the pass
unconditionally fixes the issue.
https://github.com/llvm/llvm-project/pull/166707
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