Index: lib/Target/X86/X86InstrInfo.td =================================================================== --- lib/Target/X86/X86InstrInfo.td +++ lib/Target/X86/X86InstrInfo.td @@ -2540,9 +2540,9 @@ def : MnemonicAlias<"popa", "popal", "att">, Requires<[In32BitMode]>; def : MnemonicAlias<"pusha", "pushal", "att">, Requires<[In32BitMode]>; -def : MnemonicAlias<"repe", "rep", "att">; -def : MnemonicAlias<"repz", "rep", "att">; -def : MnemonicAlias<"repnz", "repne", "att">; +def : MnemonicAlias<"repe", "rep">; +def : MnemonicAlias<"repz", "rep">; +def : MnemonicAlias<"repnz", "repne">; def : MnemonicAlias<"ret", "retw", "att">, Requires<[In16BitMode]>; def : MnemonicAlias<"ret", "retl", "att">, Requires<[In32BitMode]>; Index: test/MC/X86/intel-syntax.s =================================================================== --- test/MC/X86/intel-syntax.s +++ test/MC/X86/intel-syntax.s @@ -681,3 +681,16 @@ // CHECK: outsb (%rsi), %dx // CHECK: outsw (%rsi), %dx // CHECK: outsl (%rsi), %dx + +repe cmpsb +repz cmpsb +repne cmpsb +repnz cmpsb +//CHECK: rep +//CHECK: cmpsb %es:(%rdi), (%rsi) +//CHECK: rep +//CHECK: cmpsb %es:(%rdi), (%rsi) +//CHECK: repne +//CHECK: cmpsb %es:(%rdi), (%rsi) +//CHECK: repne +//CHECK: cmpsb %es:(%rdi), (%rsi)