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| author | Dan Gohman <gohman@apple.com> | 2008-08-06 18:27:21 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-08-06 18:27:21 +0000 |
| commit | 8a1510d19228f3cb1a847c21fa9e678a565247f7 (patch) | |
| tree | 80801ca9ac3e70d8fe5f3a491a95b823cc71b85a /lib/Target/X86/X86InstrInfo.td | |
| parent | 4ce9627e97094163f8a55cf0cb74f074bd17dfc8 (diff) | |
| download | llvm-8a1510d19228f3cb1a847c21fa9e678a565247f7.tar.gz llvm-8a1510d19228f3cb1a847c21fa9e678a565247f7.tar.bz2 llvm-8a1510d19228f3cb1a847c21fa9e678a565247f7.tar.xz | |
Re-introduce the 8-bit subreg zext-inreg patterns for x86-32,
this time using MOV32to32_ and MOV16to16_. Thanks to Evan for
suggesting this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54418 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86InstrInfo.td')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.td | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index bb90f29b0c..c4db588290 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -2774,6 +2774,16 @@ def : Pat<(i32 (and (loadi32 addr:$src), (i32 65535))),(MOVZX32rm16 addr:$src)>; // r & (2^16-1) ==> movz def : Pat<(and GR32:$src1, 0xffff), (MOVZX32rr16 (i16 (EXTRACT_SUBREG GR32:$src1, x86_subreg_16bit)))>; +// r & (2^8-1) ==> movz +def : Pat<(and GR32:$src1, 0xff), + (MOVZX32rr8 (i8 (EXTRACT_SUBREG (MOV32to32_ GR32:$src1), + x86_subreg_8bit)))>, + Requires<[In32BitMode]>; +// r & (2^8-1) ==> movz +def : Pat<(and GR16:$src1, 0xff), + (MOVZX16rr8 (i8 (EXTRACT_SUBREG (MOV16to16_ GR16:$src1), + x86_subreg_8bit)))>, + Requires<[In32BitMode]>; // (shl x, 1) ==> (add x, x) def : Pat<(shl GR8 :$src1, (i8 1)), (ADD8rr GR8 :$src1, GR8 :$src1)>; |