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Change x86 CMOVE_F to read it source, not write it.

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This was breaking sqlite with the machine verifier because operand 0 was a def according to tablegen, but didn't have the 'isDef' flag set.

Looking at the ISA, its clear that this operand is a source as writing to st(0) is implicit.  So move the operand to the correct place in the td file.

rdar://problem/20751584

llvm-svn: 236183
This commit is contained in:
Pete Cooper 2015-04-29 23:51:33 +00:00
parent 60595b4739
commit 00f179e7a1
2 changed files with 23 additions and 8 deletions
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16
lib/Target/X86/X86InstrFPStack.td
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@ -350,21 +350,21 @@ defm CMOVNP : FPCMov<X86_COND_NP>;
let Predicates = [HasCMov] in {
// These are not factored because there's no clean way to pass DA/DB.
def CMOVB_F : FPI<0xDA, MRM0r, (outs RST:$op), (ins),
def CMOVB_F : FPI<0xDA, MRM0r, (outs), (ins RST:$op),
"fcmovb\t{$op, %st(0)|st(0), $op}">;
def CMOVBE_F : FPI<0xDA, MRM2r, (outs RST:$op), (ins),
def CMOVBE_F : FPI<0xDA, MRM2r, (outs), (ins RST:$op),
"fcmovbe\t{$op, %st(0)|st(0), $op}">;
def CMOVE_F : FPI<0xDA, MRM1r, (outs RST:$op), (ins),
def CMOVE_F : FPI<0xDA, MRM1r, (outs), (ins RST:$op),
"fcmove\t{$op, %st(0)|st(0), $op}">;
def CMOVP_F : FPI<0xDA, MRM3r, (outs RST:$op), (ins),
def CMOVP_F : FPI<0xDA, MRM3r, (outs), (ins RST:$op),
"fcmovu\t{$op, %st(0)|st(0), $op}">;
def CMOVNB_F : FPI<0xDB, MRM0r, (outs RST:$op), (ins),
def CMOVNB_F : FPI<0xDB, MRM0r, (outs), (ins RST:$op),
"fcmovnb\t{$op, %st(0)|st(0), $op}">;
def CMOVNBE_F: FPI<0xDB, MRM2r, (outs RST:$op), (ins),
def CMOVNBE_F: FPI<0xDB, MRM2r, (outs), (ins RST:$op),
"fcmovnbe\t{$op, %st(0)|st(0), $op}">;
def CMOVNE_F : FPI<0xDB, MRM1r, (outs RST:$op), (ins),
def CMOVNE_F : FPI<0xDB, MRM1r, (outs), (ins RST:$op),
"fcmovne\t{$op, %st(0)|st(0), $op}">;
def CMOVNP_F : FPI<0xDB, MRM3r, (outs RST:$op), (ins),
def CMOVNP_F : FPI<0xDB, MRM3r, (outs), (ins RST:$op),
"fcmovnu\t{$op, %st(0)|st(0), $op}">;
} // Predicates = [HasCMov]

15
test/CodeGen/X86/fcmove.ll Normal file
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@ -0,0 +1,15 @@
; RUN: llc %s -o - -verify-machineinstrs | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-unknown"
; Test that we can generate an fcmove, and also that it passes verification.
; CHECK-LABEL: cmove_f
; CHECK: fcmove %st({{[0-7]}}), %st(0)
define x86_fp80 @cmove_f(x86_fp80 %a, x86_fp80 %b, i32 %c) {
%test = icmp eq i32 %c, 0
%add = fadd x86_fp80 %a, %b
%ret = select i1 %test, x86_fp80 %add, x86_fp80 %b
ret x86_fp80 %ret
}