[PATCH] D51684: [mips] Correct MUL pattern for mips64
Stefan Maksimovic via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Sep 5 07:32:42 PDT 2018
smaksimovic created this revision.
smaksimovic added a reviewer: atanasyan.
Herald added subscribers: arichardson, sdardis.
Guard existing pattern with a predicate, introduce a new one for revision 6.
https://reviews.llvm.org/D51684
Files:
lib/Target/Mips/Mips64InstrInfo.td
lib/Target/Mips/Mips64r6InstrInfo.td
Index: lib/Target/Mips/Mips64r6InstrInfo.td
===================================================================
--- lib/Target/Mips/Mips64r6InstrInfo.td
+++ lib/Target/Mips/Mips64r6InstrInfo.td
@@ -301,6 +301,9 @@
// Patterns used for matching away redundant sign extensions.
// MIPS32 arithmetic instructions sign extend their result implicitly.
+def : MipsPat<(i64 (sext (i32 (mul GPR32:$src, GPR32:$src2)))),
+ (INSERT_SUBREG (i64 (IMPLICIT_DEF)),
+ (MUL_R6 GPR32:$src, GPR32:$src2), sub_32)>;
def : MipsPat<(i64 (sext (i32 (sdiv GPR32:$src, GPR32:$src2)))),
(INSERT_SUBREG (i64 (IMPLICIT_DEF)),
(DIV GPR32:$src, GPR32:$src2), sub_32)>, ISA_MIPS64R6;
Index: lib/Target/Mips/Mips64InstrInfo.td
===================================================================
--- lib/Target/Mips/Mips64InstrInfo.td
+++ lib/Target/Mips/Mips64InstrInfo.td
@@ -838,7 +838,7 @@
(SUBu GPR32:$src, GPR32:$src2), sub_32)>;
def : MipsPat<(i64 (sext (i32 (mul GPR32:$src, GPR32:$src2)))),
(INSERT_SUBREG (i64 (IMPLICIT_DEF)),
- (MUL GPR32:$src, GPR32:$src2), sub_32)>;
+ (MUL GPR32:$src, GPR32:$src2), sub_32)>, ISA_MIPS3_NOT_32R6_64R6;
def : MipsPat<(i64 (sext (i32 (MipsMFHI ACC64:$src)))),
(INSERT_SUBREG (i64 (IMPLICIT_DEF)),
(PseudoMFHI ACC64:$src), sub_32)>;
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