https://bugs.llvm.org/show_bug.cgi?id=40632
Bug ID: 40632
Summary: [AArch64] Very bad code generation with shuffles and
llvm.aarch64.neon.smull.v4i32
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: AArch64
Assignee: unassignedb...@nondot.org
Reporter: efrie...@quicinc.com
CC: arnaud.degrandmai...@arm.com, florian_h...@apple.com,
llvm-bugs@lists.llvm.org, mara...@gmail.com,
peter.sm...@linaro.org, resis...@mac.com,
ties.st...@arm.com
#include <arm_neon.h>
int32x4_t f(int32x4_t vacc, int16x8_t vb, int16x8_t va) {
return vmull_lane_s16(vget_low_s16(vb), vget_low_s16(va), 0);
}
Produces:
dup v0.8h, v2.h[0]
ext v0.16b, v0.16b, v0.16b, #8
smull v0.4s, v1.4h, v0.4h
ret
Something is obviously going terribly wrong here.
I'll have a patch soon, I think.
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
