002d81affa
This patch fixes the current two FAILs of pr65105-5.c on x86 when compiled with -m32. These (temporary) breakages were fallout from my patches to improve/upgrade (scalar) double word comparisons. On mainline, the i386 backend currently represents a critical comparison using (compare (and (not reg1) reg2) (const_int 0)) which isn't/wasn't recognized by the STV pass' convertible_comparison_p. This simple STV patch adds support for this pattern (*testdi_not_doubleword) and generates the vector pandn and ptest instructions expected in the existing (failing) test case. 2022-07-09 Roger Sayle <roger@nextmovesoftware.com> gcc/ChangeLog * config/i386/i386-features.cc (convert_compare): Add support for *testdi_not_doubleword pattern, "(compare (and (not ...)))" by generating a pandn followed by ptest. (convertible_comparison_p): Recognize both *cmpdi_doubleword and recent *testdi_not_doubleword comparison patterns. |
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