llvm-project

Commit Graph

Author	SHA1	Message	Date
Stefan Maksimovic	4a612d4bf2	[mips] Sign extend i32 return values on MIPS64 Override getTypeForExtReturn so that functions returning an i32 typed value have it sign extended on MIPS64. Also provide patterns to get rid of unneeded sign extensions for arithmetic instructions which implicitly sign extend their results. Differential Revision: https://reviews.llvm.org/D48374 llvm-svn: 338019	2018-07-26 10:59:35 +00:00
Vasileios Kalintiris	044e172228	Revert r229675 - [mips] Avoid redundant sign extension of the result of binary bitwise instructions. It introduced two regressions on 64-bit big-endian targets running under N32 (MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4, and MultiSource/Applications/kimwitu++/kc) The issue is that on 64-bit targets comparisons such as BEQ compare the whole GPR64 but incorrectly tell the instruction selector that they operate on GPR32's. This leads to the elimination of i32->i64 extensions that are actually required by comparisons to work correctly. There's currently a patch under review that fixes this problem. llvm-svn: 243984	2015-08-04 14:26:35 +00:00
Vasileios Kalintiris	bb60cfb5c4	[mips] Teach the delay slot filler to remove needless KILL instructions. Summary: Previously, the presence of KILL instructions would block valid candidates from filling a specific delay slot. With the elimination of the KILL instructions, in the appropriate range, we are able to fill more slots and keep the information from future def/use analysis consistent. Reviewers: dsanders Reviewed By: dsanders Subscribers: hfinkel, llvm-commits Differential Revision: http://reviews.llvm.org/D7724 llvm-svn: 235183	2015-04-17 12:01:02 +00:00

Author

SHA1

Message

Date

Stefan Maksimovic

4a612d4bf2

[mips] Sign extend i32 return values on MIPS64

Override getTypeForExtReturn so that functions returning
an i32 typed value have it sign extended on MIPS64.

Also provide patterns to get rid of unneeded sign extensions
for arithmetic instructions which implicitly sign extend
their results.

Differential Revision: https://reviews.llvm.org/D48374

llvm-svn: 338019

2018-07-26 10:59:35 +00:00

Vasileios Kalintiris

044e172228

Revert r229675 - [mips] Avoid redundant sign extension of the result of binary bitwise instructions.

It introduced two regressions on 64-bit big-endian targets running under N32
(MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4, and
MultiSource/Applications/kimwitu++/kc) The issue is that on 64-bit targets
comparisons such as BEQ compare the whole GPR64 but incorrectly tell the
instruction selector that they operate on GPR32's. This leads to the
elimination of i32->i64 extensions that are actually required by
comparisons to work correctly.

There's currently a patch under review that fixes this problem.

llvm-svn: 243984

2015-08-04 14:26:35 +00:00

Vasileios Kalintiris

bb60cfb5c4

[mips] Teach the delay slot filler to remove needless KILL instructions.

Summary:
Previously, the presence of KILL instructions would block valid candidates
from filling a specific delay slot. With the elimination of the KILL
instructions, in the appropriate range, we are able to fill more slots and
keep the information from future def/use analysis consistent.

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: hfinkel, llvm-commits

Differential Revision: http://reviews.llvm.org/D7724

llvm-svn: 235183

2015-04-17 12:01:02 +00:00

3 Commits