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| author | Karthik Bhat <kv.bhat@samsung.com> | 2014-12-22 13:38:58 +0000 |
|---|---|---|
| committer | Karthik Bhat <kv.bhat@samsung.com> | 2014-12-22 13:38:58 +0000 |
| commit | bf662901c1c7d94e23c359468ebca5e5e059419c (patch) | |
| tree | 830e88fe6c26028575c0060702cad9558d568375 /llvm/lib | |
| parent | 2645d33977bc6692c1d646289d99bcddf2eb1237 (diff) | |
| download | bcm5719-llvm-bf662901c1c7d94e23c359468ebca5e5e059419c.tar.gz bcm5719-llvm-bf662901c1c7d94e23c359468ebca5e5e059419c.zip | |
Lower multiply-negate operation to mneg on AArch64
This patch pattern matches code such as-
neg w8, w8
mul w8, w9, w8
to
mneg w8, w8, w9
Review: http://reviews.llvm.org/D6754
llvm-svn: 224706
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/AArch64/AArch64InstrInfo.td | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.td b/llvm/lib/Target/AArch64/AArch64InstrInfo.td index 01a01e059a5..3f1dbe0bfc0 100644 --- a/llvm/lib/Target/AArch64/AArch64InstrInfo.td +++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.td @@ -657,6 +657,10 @@ def : Pat<(i32 (ineg (mul GPR32:$Rn, GPR32:$Rm))), (MSUBWrrr GPR32:$Rn, GPR32:$Rm, WZR)>; def : Pat<(i64 (ineg (mul GPR64:$Rn, GPR64:$Rm))), (MSUBXrrr GPR64:$Rn, GPR64:$Rm, XZR)>; +def : Pat<(i32 (mul (ineg GPR32:$Rn), GPR32:$Rm)), + (MSUBWrrr GPR32:$Rn, GPR32:$Rm, WZR)>; +def : Pat<(i64 (mul (ineg GPR64:$Rn), GPR64:$Rm)), + (MSUBXrrr GPR64:$Rn, GPR64:$Rm, XZR)>; } // AddedComplexity = 7 let AddedComplexity = 5 in { |
