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llvm-mirror/test/CodeGen/X86/mingw-alloca.ll
Hans Wennborg fe6fe553f7 [X86] Enable call frame optimization ("mov to push") not only for optsize (PR26325)
The size savings are significant, and from what I can tell, both ICC and GCC do this.

Differential Revision: http://reviews.llvm.org/D18573

llvm-svn: 264966
2016-03-30 23:38:01 +00:00

38 lines
1.0 KiB
LLVM

; RUN: llc < %s -mtriple=i386-pc-mingw32 | FileCheck %s -check-prefix=COFF
; RUN: llc < %s -mtriple=i386-pc-mingw32-elf | FileCheck %s -check-prefix=ELF
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"
define void @foo1(i32 %N) nounwind {
entry:
; COFF: _foo1:
; COFF: calll __alloca
; ELF: foo1:
; ELF: calll _alloca
%tmp14 = alloca i32, i32 %N ; <i32*> [#uses=1]
call void @bar1( i32* %tmp14 )
ret void
}
declare void @bar1(i32*)
define void @foo2(i32 inreg %N) nounwind {
entry:
; COFF: _foo2:
; COFF: andl $-16, %esp
; COFF: pushl %eax
; COFF: calll __alloca
; COFF: movl 8012(%esp), %eax
; ELF: foo2:
; ELF: andl $-16, %esp
; ELF: pushl %eax
; ELF: calll _alloca
; ELF: movl 8012(%esp), %eax
%A2 = alloca [2000 x i32], align 16 ; <[2000 x i32]*> [#uses=1]
%A2.sub = getelementptr [2000 x i32], [2000 x i32]* %A2, i32 0, i32 0 ; <i32*> [#uses=1]
call void @bar2( i32* %A2.sub, i32 %N )
ret void
}
declare void @bar2(i32*, i32)