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llvm-mirror/test/CodeGen/X86/apm.ll
Jakob Stoklund Olesen 9594629bf1 Partition use lists so defs always come before uses.
This makes it possible to speed up def_iterator by stopping at the first
use. This makes def_empty() and getUniqueVRegDef() much faster when
there are many uses.

In a +Asserts build, LiveVariables is 100x faster in one case because
getVRegDef() has an assertion that would scan to the end of a
def_iterator chain.

Spill weight calculation is significantly faster (300x in one case)
because isTriviallyReMaterializable() calls MRI->isConstantPhysReg(%RIP)
which calls def_empty(%RIP).

llvm-svn: 161634
2012-08-09 22:49:46 +00:00

36 lines
930 B
LLVM

; RUN: llc < %s -mtriple=x86_64-linux -mattr=+sse3 | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-win32 -mattr=+sse3 | FileCheck %s -check-prefix=WIN64
; PR8573
; CHECK: foo:
; CHECK: leaq (%rdi), %rax
; CHECK-NEXT: movl %esi, %ecx
; CHECK-NEXT: monitor
; WIN64: foo:
; WIN64: leaq (%rcx), %rax
; WIN64-NEXT: movl %edx, %ecx
; WIN64-NEXT: movl %r8d, %edx
; WIN64-NEXT: monitor
define void @foo(i8* %P, i32 %E, i32 %H) nounwind {
entry:
tail call void @llvm.x86.sse3.monitor(i8* %P, i32 %E, i32 %H)
ret void
}
declare void @llvm.x86.sse3.monitor(i8*, i32, i32) nounwind
; CHECK: bar:
; CHECK: movl %edi, %ecx
; CHECK-NEXT: movl %esi, %eax
; CHECK-NEXT: mwait
; WIN64: bar:
; WIN64: movl %edx, %eax
; WIN64-NEXT: mwait
define void @bar(i32 %E, i32 %H) nounwind {
entry:
tail call void @llvm.x86.sse3.mwait(i32 %E, i32 %H)
ret void
}
declare void @llvm.x86.sse3.mwait(i32, i32) nounwind