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| author | Kenneth Uildriks <kennethuil@gmail.com> | 2009-12-15 03:27:52 +0000 |
|---|---|---|
| committer | Kenneth Uildriks <kennethuil@gmail.com> | 2009-12-15 03:27:52 +0000 |
| commit | 76df3f398cf853ff495f4bba4d5da56c9d56c6da (patch) | |
| tree | 1e5a3f5921239fb4531d9db41a8d1aa360a953b9 /lib/Target/X86/X86CallingConv.td | |
| parent | eb751d8c2da1a9b0d84139e19e20288d9b978451 (diff) | |
| download | llvm-76df3f398cf853ff495f4bba4d5da56c9d56c6da.tar.gz llvm-76df3f398cf853ff495f4bba4d5da56c9d56c6da.tar.bz2 llvm-76df3f398cf853ff495f4bba4d5da56c9d56c6da.tar.xz | |
For fastcc on x86, let ECX be used as a return register after EAX and EDX
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91410 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86CallingConv.td')
| -rw-r--r-- | lib/Target/X86/X86CallingConv.td | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/Target/X86/X86CallingConv.td b/lib/Target/X86/X86CallingConv.td index d77f0390b1..12d3d04eb6 100644 --- a/lib/Target/X86/X86CallingConv.td +++ b/lib/Target/X86/X86CallingConv.td @@ -64,11 +64,18 @@ def RetCC_X86_32_C : CallingConv<[ // X86-32 FastCC return-value convention. def RetCC_X86_32_Fast : CallingConv<[ // The X86-32 fastcc returns 1, 2, or 3 FP values in XMM0-2 if the target has - // SSE2, otherwise it is the the C calling conventions. + // SSE2. // This can happen when a float, 2 x float, or 3 x float vector is split by // target lowering, and is returned in 1-3 sse regs. CCIfType<[f32], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0,XMM1,XMM2]>>>, CCIfType<[f64], CCIfSubtarget<"hasSSE2()", CCAssignToReg<[XMM0,XMM1,XMM2]>>>, + + // For integers, ECX can be used as an extra return register + CCIfType<[i8], CCAssignToReg<[AL, DL, CL]>>, + CCIfType<[i16], CCAssignToReg<[AX, DX, CX]>>, + CCIfType<[i32], CCAssignToReg<[EAX, EDX, ECX]>>, + + // Otherwise, it is the same as the common X86 calling convention. CCDelegateTo<RetCC_X86Common> ]>; |