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If SSE2 is available, x86 should pass first 3 f32/f64 arguments in XMM registers for fastcc calls.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55840 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-09-05 17:24:07 +00:00
parent c89d2feb35
commit e2471a9169
4 changed files with 21 additions and 5 deletions
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6
lib/Target/X86/X86CallingConv.td
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@ -352,6 +352,12 @@ def CC_X86_32_FastCC : CallingConv<[
// The first 2 integer arguments are passed in ECX/EDX
CCIfType<[i32], CCAssignToReg<[ECX, EDX]>>,
// The first 3 float or double arguments, if the call is not a vararg
// call and if SSE2 is available, are passed in SSE registers.
CCIfNotVarArg<CCIfType<[f32,f64],
CCIfSubtarget<"hasSSE2()",
CCAssignToReg<[XMM0,XMM1,XMM2]>>>>,
// Doubles get 8-byte slots that are 8-byte aligned.
CCIfType<[f64], CCAssignToStack<8, 8>>,

8
test/CodeGen/X86/constant-pool-remat-0.ll
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@ -1,13 +1,13 @@
; RUN: llvm-as < %s | llc -march=x86-64 | grep LCPI | count 3
; RUN: llvm-as < %s | llc -march=x86-64 -stats -info-output-file - | grep asm-printer | grep 6
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 | grep LCPI | count 3
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -stats -info-output-file - | grep asm-printer | grep 8
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -stats -info-output-file - | grep asm-printer | grep 12
declare fastcc float @qux(float %y)
declare float @qux(float %y)
define fastcc float @array(float %a) nounwind {
define float @array(float %a) nounwind {
%n = mul float %a, 9.0
%m = call fastcc float @qux(float %n)
%m = call float @qux(float %n)
%o = mul float %m, 9.0
ret float %o
}

10
test/CodeGen/X86/fastcc-2.ll Normal file
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@ -0,0 +1,10 @@
; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin -mattr=+sse2 | grep movsd
; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin -mattr=+sse2 | grep mov | count 1
define i32 @foo() nounwind {
entry:
tail call fastcc void @bar( double 1.000000e+00 ) nounwind
ret i32 0
}
declare fastcc void @bar(double)

2
test/CodeGen/X86/fastcc.ll
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@ -1,5 +1,5 @@
; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin | grep mov | grep ecx | grep 0
; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin | grep mov | grep xmm0 | grep 16
; RUN: llvm-as < %s | llc -mtriple=i686-apple-darwin | grep mov | grep xmm0 | grep 8
@d = external global double ; <double*> [#uses=1]
@c = external global double ; <double*> [#uses=1]