RE: [PATCH] x86: Compile some check-function-bodies tests with -mtune=generic

> -----Original Message-----
> From: H.J. Lu <[email protected]>
> Sent: Thursday, August 20, 2026 7:52 AM
> To: GCC Patches <[email protected]>; Uros Bizjak
> <[email protected]>; Liu, Hongtao <[email protected]>
> Subject: [PATCH] x86: Compile some check-function-bodies tests with -
> mtune=generic
> 
> Compile some check-function-bodies tests with -mtune=generic to avoid
> 
> FAIL: gcc.target/i386/memset-pr120683-10.c check-function-bodies foo
> FAIL: gcc.target/i386/memset-pr120683-12.c check-function-bodies foo
> FAIL: gcc.target/i386/pr122343-1b.c check-function-bodies foo
> FAIL: gcc.target/i386/pr122343-5b.c check-function-bodies foo
> 
> due to the generated sequence
> 
> movq $0, 29(%rdi)
> movq $0, 37(%rdi)
> movq $0, 45(%rdi)
> movq $0, 53(%rdi)
> movq $0, (%rdi)
> movq $0, 8(%rdi)
> movq $0, 16(%rdi)
> movq $0, 24(%rdi)
> 
> vs the expected sequence
> 
> movq $0, 48(%rdi)
> movq $0, (%rdi)
> movq $0, 8(%rdi)
> movq $0, 16(%rdi)
> movq $0, 24(%rdi)
> movq $0, 32(%rdi)
> movq $0, 40(%rdi)
> movq $0, 53(%rdi)
> 
> when a different tuning is enabled by default.
Can we check  movq $0, [1-9]*(%rdi), use regex for the disp?

> 
> PR testsuite/126923
> * gcc.target/i386/memset-pr120683-10.c (dg-options): Add -mtune=generic.
> * gcc.target/i386/memset-pr120683-12.c (dg-options): Likewise.
> * gcc.target/i386/pr122343-1b.c (dg-options): Likewise.
> * gcc.target/i386/pr122343-1b.c (dg-options): Likewise.
> 
> --
> H.J.