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X86: fcmov doesn't handle all possible EFLAGS, fall back to a branch for the others.

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Otherwise it will try to use SSE patterns and fail horribly if sse is disabled.
Fixes PR14035.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165377 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2012-10-07 15:34:27 +00:00
parent b10c88f175
commit dcf2420b07
2 changed files with 459 additions and 1 deletions
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9
lib/Target/X86/X86InstrCompiler.td
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@@ -446,6 +446,11 @@ def CMOV_GR16 : I<0, Pseudo,
"#CMOV_GR16* PSEUDO!",
[(set GR16:$dst,
(X86cmov GR16:$src1, GR16:$src2, imm:$cond, EFLAGS))]>;
} // Predicates = [NoCMov]
// fcmov doesn't handle all possible EFLAGS, provide a fallback if there is no
// SSE1.
let Predicates = [FPStackf32] in
def CMOV_RFP32 : I<0, Pseudo,
(outs RFP32:$dst),
(ins RFP32:$src1, RFP32:$src2, i8imm:$cond),
@@ -453,6 +458,9 @@ def CMOV_RFP32 : I<0, Pseudo,
[(set RFP32:$dst,
(X86cmov RFP32:$src1, RFP32:$src2, imm:$cond,
EFLAGS))]>;
// fcmov doesn't handle all possible EFLAGS, provide a fallback if there is no
// SSE2.
let Predicates = [FPStackf64] in
def CMOV_RFP64 : I<0, Pseudo,
(outs RFP64:$dst),
(ins RFP64:$src1, RFP64:$src2, i8imm:$cond),
@@ -467,7 +475,6 @@ def CMOV_RFP80 : I<0, Pseudo,
[(set RFP80:$dst,
(X86cmov RFP80:$src1, RFP80:$src2, imm:$cond,
EFLAGS))]>;
} // Predicates = [NoCMov]
} // UsesCustomInserter = 1, Uses = [EFLAGS]