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llvm-mirror/test/CodeGen/X86/constant-pool-sharing.ll
David Majnemer 94c981273e CodeGen: Stick constant pool entries in COMDAT sections for WinCOFF
COFF lacks a feature that other object file formats support: mergeable
sections.

To work around this, MSVC sticks constant pool entries in special COMDAT
sections so that each constant is in it's own section.  This permits
unused constants to be dropped and it also allows duplicate constants in
different translation units to get merged together.

This fixes PR20262.

Differential Revision: http://reviews.llvm.org/D4482

llvm-svn: 213006
2014-07-14 22:57:27 +00:00

22 lines
877 B
LLVM

; RUN: llc < %s -mtriple=x86_64-linux -mcpu=corei7 | FileCheck %s --check-prefix=COMMON --check-prefix=LINUX
; RUN: llc < %s -mtriple=x86_64-win32 -mcpu=corei7 | FileCheck %s --check-prefix=COMMON --check-prefix=MSVC
; llc should share constant pool entries between this integer vector
; and this floating-point vector since they have the same encoding.
; LINUX: LCPI0_0(%rip), %xmm0
; MSVC: __xmm@40000000400000004000000040000000(%rip), %xmm0
; COMMON: movaps %xmm0, ({{%rdi|%rcx}})
; COMMON: movaps %xmm0, ({{%rsi|%rdx}})
define void @foo(<4 x i32>* %p, <4 x float>* %q, i1 %t) nounwind {
entry:
br label %loop
loop:
store <4 x i32><i32 1073741824, i32 1073741824, i32 1073741824, i32 1073741824>, <4 x i32>* %p
store <4 x float><float 2.0, float 2.0, float 2.0, float 2.0>, <4 x float>* %q
br i1 %t, label %loop, label %ret
ret:
ret void
}