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69a9ee05c6
More enable-rtl-checking fixes for ext-dce. Very similar to the one recently posted, this time covering more of the shift ops. I checked all instances of CONSTANT_P guarding [U]INTVAL and fixed all that looked wrong. I also created a dummy assembler/linker so that I could run the GCC testsuite on gcn and verified that wasn't tripping any rtl-checking bugs in ext-dce anymore. Obviously this has also gone through x86 bootstrap and regression tested. Pushing to the trunk. pr target/116104 gcc/ * ext-dce.cc (carry_backpropagate): Change more guards of [U]INTVAL to test CONST_INT_P rather than CONSTANT_P, fixing rtl-checking failures.
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