https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114607
Bug ID: 114607
Summary: aarch64: Incorrect expansion of svsudot
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: rsandifo at gcc dot gnu.org
Target Milestone: ---
Target: aarch64*-*-*
svsudot is supposed to expand to USDOT with the second and third arguments
swapped. However, there is a thinko in the code that does the reversal, making
it a no-op. Unfortunately, the tests simply accept the buggy form. :-(
For example, gcc.target/aarch64/sve/acle/asm/sudot_s32.c contains:
/*
** sudot_s32_tied1:
** usdot z0\.s, z2\.b, z4\.b
** ret
*/
TEST_TRIPLE_Z (sudot_s32_tied1, svint32_t, svint8_t, svuint8_t,
z0 = svsudot_s32 (z0, z2, z4),
z0 = svsudot (z0, z2, z4))
where the usdot z2 and z4 operands should be in the opposite order.
