GCC modified for the FreeChainXenon project
880682e7b2
The r10-2806 change regressed following testcases, instead of doing int -> unsigned long sign-extension once and then add 8, 16, ... 56 to it for each of the memory access, it adds 8, 16, ... 56 in int mode and then sign extends each. So that means: + movq $0, (%rsp,%rax,8) + leal 1(%rdx), %eax + cltq + movq $1, (%rsp,%rax,8) + leal 2(%rdx), %eax + cltq + movq $2, (%rsp,%rax,8) + leal 3(%rdx), %eax + cltq + movq $3, (%rsp,%rax,8) + leal 4(%rdx), %eax + cltq + movq $4, (%rsp,%rax,8) + leal 5(%rdx), %eax + cltq + movq $5, (%rsp,%rax,8) + leal 6(%rdx), %eax + addl $7, %edx + cltq + movslq %edx, %rdx + movq $6, (%rsp,%rax,8) + movq $7, (%rsp,%rdx,8) - movq $0, (%rsp,%rdx,8) - movq $1, 8(%rsp,%rdx,8) - movq $2, 16(%rsp,%rdx,8) - movq $3, 24(%rsp,%rdx,8) - movq $4, 32(%rsp,%rdx,8) - movq $5, 40(%rsp,%rdx,8) - movq $6, 48(%rsp,%rdx,8) - movq $7, 56(%rsp,%rdx,8) GCC 9 -> 10 change or: - movq $0, (%rsp,%rdx,8) - movq $1, 8(%rsp,%rdx,8) - movq $2, 16(%rsp,%rdx,8) - movq $3, 24(%rsp,%rdx,8) - movq $4, 32(%rsp,%rdx,8) - movq $5, 40(%rsp,%rdx,8) - movq $6, 48(%rsp,%rdx,8) - movq $7, 56(%rsp,%rdx,8) + movq $0, (%rsp,%rax,8) + leal 1(%rdx), %eax + movq $1, (%rsp,%rax,8) + leal 2(%rdx), %eax + movq $2, (%rsp,%rax,8) + leal 3(%rdx), %eax + movq $3, (%rsp,%rax,8) + leal 4(%rdx), %eax + movq $4, (%rsp,%rax,8) + leal 5(%rdx), %eax + movq $5, (%rsp,%rax,8) + leal 6(%rdx), %eax + movq $6, (%rsp,%rax,8) + leal 7(%rdx), %eax + movq $7, (%rsp,%rax,8) change on the other test. While for the former case of int there is due to signed integer overflow (unless -fwrapv) the possibility to undo it e.g. during expansion, for the unsigned case information is unfortunately lost. The following patch adds :s to the convert which restores these testcases but keeps the testcases the patch meant to improve as is. 2021-02-25 Jakub Jelinek <jakub@redhat.com> PR target/95798 * match.pd ((T)(A) + CST -> (T)(A + CST)): Add :s to convert. * gcc.target/i386/pr95798-1.c: New test. * gcc.target/i386/pr95798-2.c: New test. |
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