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Hi, PR target/50099 is a case where we are using the wrong predicate for the sign_extend from QI to DImode values. ldrsb has a lower range than the other ldrb instructions in ARM state and hence one has to be careful about generating the right addresses when splitting it. Attached is a patch to fix this. I will commit this if there are no regressions. A backport to 4.6 branch will be done after suitable regression testing. cheers Ramana 2011-09-06 Ramana Radhakrishnan <ramana.radhakrishnan@linaro.org> PR target/50099 * config/arm/iterators.md (qhs_zextenddi_cstr): New. (qhs_zextenddi_op): New. * config/arm/arm.md ("zero_extend<mode>di2"): Use them. * config/arm/predicates.md ("arm_extendqisi_mem_op"): Distinguish between ARM and Thumb2 states. PR target/50099 * gcc.target/arm/pr50099.c: New test.
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pr50099-patch.txt
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