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Enable support for returning two long-double values in ST(0)/ST(1).

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This allows us to compile fp-stack-2results.ll into:

_test:
	fldz
	fld1
	ret

which returns 1 in ST(0) and 0 in ST(1).  This is needed for x86-64
_Complex long double.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48632 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2008-03-21 05:57:20 +00:00
parent 41dc0fcb68
commit 0353526ed1
3 changed files with 15 additions and 7 deletions
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11
test/CodeGen/X86/fp-stack-2results.ll Normal file
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@@ -0,0 +1,11 @@
; RUN: llvm-as < %s | llc -march=x86 | grep fldz
; RUN: llvm-as < %s | llc -march=x86-64 | grep fld1
; This is basically this code on x86-64:
; _Complex long double test() { return 1.0; }
define {x86_fp80, x86_fp80} @test() {
%A = fpext double 1.0 to x86_fp80
%B = fpext double 0.0 to x86_fp80
ret x86_fp80 %A, x86_fp80 %B
}