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Codegen:

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as:

_bar:
	pushl	%esi
	subl	$8, %esp
	movl	16(%esp), %esi
	call	L_foo$stub
	fstps	(%esi)
	addl	$8, %esp
	popl	%esi
	#FP_REG_KILL
	ret

instead of:

_bar:
	pushl	%esi
	subl	$8, %esp
	movl	16(%esp), %esi
	call	L_foo$stub
	fstpl	(%esi)
	cvtsd2ss	(%esi), %xmm0
	movss	%xmm0, (%esi)
	addl	$8, %esp
	popl	%esi
	#FP_REG_KILL
	ret



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45401 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2007-12-29 06:57:38 +00:00
parent 5938bef2d2
commit d60eedca01
2 changed files with 40 additions and 4 deletions
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11
test/CodeGen/X86/fp-stack-ret-store.ll
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@@ -13,3 +13,14 @@ entry:
}
declare double @foo(...)
define void @bar2(float* %P) {
entry:
%tmp = tail call double (...)* @foo2( ) ; <double> [#uses=1]
%tmp1 = fptrunc double %tmp to float ; <float> [#uses=1]
store float %tmp1, float* %P, align 4
ret void
}
declare double @foo2(...)