llvm-6502/test/CodeGen/X86/x86-64-dead-stack-adjust.ll

; RUN: llvm-as < %s | llc | not grep rsp
; RUN: llvm-as < %s | llc | grep cvttsd2siq

target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
target triple = "x86_64-apple-darwin8"

define double @a(double %b) nounwind  {
entry:
	%tmp12 = fptoui double %b to i32		; <i32> [#uses=1]
	%tmp123 = uitofp i32 %tmp12 to double		; <double> [#uses=1]
	ret double %tmp123
}
actually run llc, thanks Dan :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47677 91177308-0d34-0410-b5e6-96231b3b80d8 2008-02-27 17:46:54 +00:00			`; RUN: llvm-as < %s \| llc \| not grep rsp`
			`; RUN: llvm-as < %s \| llc \| grep cvttsd2siq`

Make X86TargetLowering::LowerSINT_TO_FP return without creating a dead stack slot and store if the SINT_TO_FP is actually legal. This allows us to compile: double a(double b) {return (unsigned)b;} to: _a: cvttsd2siq %xmm0, %rax movl %eax, %eax cvtsi2sdq %rax, %xmm0 ret instead of: _a: subq $8, %rsp cvttsd2siq %xmm0, %rax movl %eax, %eax cvtsi2sdq %rax, %xmm0 addq $8, %rsp ret crazy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47660 91177308-0d34-0410-b5e6-96231b3b80d8 2008-02-27 05:57:41 +00:00			`target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"`
			`target triple = "x86_64-apple-darwin8"`

			`define double @a(double %b) nounwind {`
			`entry:`
			`%tmp12 = fptoui double %b to i32 ; <i32> [#uses=1]`
			`%tmp123 = uitofp i32 %tmp12 to double ; <double> [#uses=1]`
			`ret double %tmp123`
			`}`