Commit Graph

8 Commits

Author SHA1 Message Date
Alex Bradbury 3ff2022bb9 [RISCV] Introduce pattern for materialising immediates with 0 for lower 12 bits
These immediates can be materialised with just an lui, rather than an lui+addi 
pair.

llvm-svn: 330293
2018-04-18 20:34:23 +00:00
Alex Bradbury 099c720426 Revert "[RISCV] implement li pseudo instruction"
Reverts rL330224, while issues with the C extension and missed common
subexpression elimination opportunities are addressed. Neither of these issues
are visible in current RISC-V backend unit tests, which clearly need
expanding.

llvm-svn: 330281
2018-04-18 19:02:31 +00:00
Alex Bradbury 75a4e52580 [RISCV] Add specific tests for materialising imm32hi20 constants
i.e. constants that can be materialised with a single lui, as the lower 12 
bits are zero.

llvm-svn: 330274
2018-04-18 16:43:03 +00:00
Alex Bradbury 7d6aa1f7ae [RISCV] Implement frame pointer elimination
llvm-svn: 322839
2018-01-18 11:34:02 +00:00
Alex Bradbury 59136ffab1 [RISCV] Enable emission of alias instructions by default
This patch switches the default for -riscv-no-aliases to false
and updates all affected MC and CodeGen tests. As recommended in
D41071, MC tests use the canonical instructions and the CodeGen
tests use the aliases.

Additionally, for the f and d instructions with rounding mode,
the tests for the aliased versions are moved and tightened such
that they can actually detect if alias emission is enabled.
(see D40902 for context)

Differential Revision: https://reviews.llvm.org/D41225

Patch by Mario Werner.

llvm-svn: 320797
2017-12-15 09:47:01 +00:00
Alex Bradbury b014e3de52 [RISCV] Implement prolog and epilog insertion
As frame pointer elimination isn't implemented until a later patch and we make 
extensive use of update_llc_test_checks.py, this changes touches a lot of the 
RISC-V tests.

Differential Revision: https://reviews.llvm.org/D39849

llvm-svn: 320357
2017-12-11 12:34:11 +00:00
Francis Visoiu Mistrih 25528d6de7 [CodeGen] Unify MBB reference format in both MIR and debug output
As part of the unification of the debug format and the MIR format, print
MBB references as '%bb.5'.

The MIR printer prints the IR name of a MBB only for block definitions.

* find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)->getNumber\(\)/" << printMBBReference(*\1)/g'
* find . \( -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#" << ([a-zA-Z0-9_]+)\.getNumber\(\)/" << printMBBReference(\1)/g'
* find . \( -name "*.txt" -o -name "*.s" -o -name "*.mir" -o -name "*.cpp" -o -name "*.h" -o -name "*.ll" \) -type f -print0 | xargs -0 sed -i '' -E 's/BB#([0-9]+)/%bb.\1/g'
* grep -nr 'BB#' and fix

Differential Revision: https://reviews.llvm.org/D40422

llvm-svn: 319665
2017-12-04 17:18:51 +00:00
Alex Bradbury 0f0e1b54f0 [RISCV] Codegen support for materializing constants
Differential Revision: https://reviews.llvm.org/D39101

llvm-svn: 317684
2017-11-08 12:02:22 +00:00