Commit Graph

7 Commits

Author SHA1 Message Date
Nemanja Ivanovic 009016bb70 [PowerPC] Pretty-print CR bits the way the binutils disassembler does
This patch just adds printing of CR bit registers in a more human-readable
form akin to that used by the GNU binutils.

Differential Revision: https://reviews.llvm.org/D31494

llvm-svn: 309001
2017-07-25 18:26:35 +00:00
Nemanja Ivanovic 3c7e276d24 [PowerPC] Ensure displacements for DQ-Form instructions are multiples of 16
As outlined in the PR, we didn't ensure that displacements for DQ-Form
instructions are multiples of 16. Since the instruction encoding encodes
a quad-word displacement, a sub-16 byte displacement is meaningless and
ends up being encoded incorrectly.

Fixes https://bugs.llvm.org/show_bug.cgi?id=33671.

Differential Revision: https://reviews.llvm.org/D35007

llvm-svn: 307934
2017-07-13 18:17:10 +00:00
Lei Huang 168d14b143 [PowerPC] Reduce register pressure by not materializing a constant just for use as an index register for X-Form loads/stores.
For this example:
float test (int *arr) {
    return arr[2];
}

We currently generate the following code:
  li r4, 8
  lxsiwax f0, r3, r4
  xscvsxdsp f1, f0

With this patch, we will now generate:
  addi r3, r3, 8
  lxsiwax f0, 0, r3
  xscvsxdsp f1, f0

Originally reported in: https://bugs.llvm.org/show_bug.cgi?id=27204
Differential Revision: https://reviews.llvm.org/D35027

llvm-svn: 307553
2017-07-10 16:44:45 +00:00
Zaara Syeda 932978315b P9: D-form vector load/store. Differential Revision: https://reviews.llvm.org/D33248
llvm-svn: 303780
2017-05-24 17:50:37 +00:00
Nemanja Ivanovic b89c27f515 [PowerPC] Emit VMX loads/stores for aligned ops to avoid adding swaps on LE
Fixes PR30730.
This is a re-commit of a pulled commit. The commit was pulled because some
software projects contained uses of Altivec vectors that violated alignment
requirements. Known issues have now been fixed.

Committing on behalf of Lei Huang.

Differential Revision: https://reviews.llvm.org/D26861

llvm-svn: 301892
2017-05-02 01:47:34 +00:00
Ehsan Amiri 741b387563 [PPC] corrections in two testcases
Removing sensitivity to scheduling (by using CHECK-DAG instead of CHECK) and
some other minor corrections.

In preparation to commit Power9 processor model.

llvm-svn: 289900
2016-12-16 00:33:07 +00:00
Nemanja Ivanovic 15748f4921 [PowerPC] Improvements for BUILD_VECTOR Vol. 4
This is the final patch in the series of patches that improves
BUILD_VECTOR handling on PowerPC. This adds a few peephole optimizations
to remove redundant instructions. It also adds a large test case which
encompasses a large set of code patterns that build vectors - this test
case was the motivator for this series of patches.

Differential Revision: https://reviews.llvm.org/D26066

llvm-svn: 288800
2016-12-06 11:47:14 +00:00