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[mips] Correct MUL pattern for mips64

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Guard existing pattern with a predicate, introduce a new one for revision 6.

Differential Revision: https://reviews.llvm.org/D51684


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@342946 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Stefan Maksimovic 2018-09-25 06:27:49 +00:00
parent ae4ef7d35c
commit 24ab3f138f
2 changed files with 4 additions and 1 deletions
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2
lib/Target/Mips/Mips64InstrInfo.td
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@ -838,7 +838,7 @@ def : MipsPat<(i64 (sext (i32 (sub GPR32:$src, GPR32:$src2)))),
(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)>;

3
lib/Target/Mips/Mips64r6InstrInfo.td
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@ -301,6 +301,9 @@ def : MipsPat<(select (i32 (seteq i32:$cond, immz)), immz, i64:$f),
// 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)>, ISA_MIPS64R6;
def : MipsPat<(i64 (sext (i32 (sdiv GPR32:$src, GPR32:$src2)))),
(INSERT_SUBREG (i64 (IMPLICIT_DEF)),
(DIV GPR32:$src, GPR32:$src2), sub_32)>, ISA_MIPS64R6;