diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.td | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index 3af3911ef3..ab9869abc5 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -1258,6 +1258,17 @@ include "X86InstrCompiler.td" // Assembler Aliases //===----------------------------------------------------------------------===// +// movsx aliases +def : InstAlias<(outs GR32:$dst), (ins GR8 :$src), + "movsx $src, $dst", + (MOVSX32rr8 GR32:$dst, GR8:$src)>; +def : InstAlias<(outs GR32:$dst), (ins GR16:$src), + "movsx $src, $dst", + (MOVSX32rr16 GR32:$dst, GR16:$src)>; + + +// TODO: lidtl/lidtq can be opcode aliases, perhaps others. + def : MnemonicAlias<"iret", "iretl">; def : MnemonicAlias<"sysret", "sysretl">; def : MnemonicAlias<"cbw", "cbtw">; @@ -1272,6 +1283,9 @@ def : MnemonicAlias<"popf", "popfl">, Requires<[In32BitMode]>; def : MnemonicAlias<"popf", "popfq">, Requires<[In64BitMode]>; def : MnemonicAlias<"popfd", "popfl">; +// FIXME: This is wrong for "push reg". "push %bx" should turn into pushw in +// all modes. However: "push (addr)" and "push $42" should default to +// pushl/pushq depending on the current mode. Similar for "pop %bx" def : MnemonicAlias<"push", "pushl">, Requires<[In32BitMode]>; def : MnemonicAlias<"push", "pushq">, Requires<[In64BitMode]>; def : MnemonicAlias<"pushf", "pushfl">, Requires<[In32BitMode]>; |