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https://github.com/c64scene-ar/llvm-6502.git
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81a6995243
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). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161634 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
930 B
LLVM
36 lines
930 B
LLVM
; RUN: llc < %s -mtriple=x86_64-linux -mattr=+sse3 | FileCheck %s
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; RUN: llc < %s -mtriple=x86_64-win32 -mattr=+sse3 | FileCheck %s -check-prefix=WIN64
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; PR8573
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; CHECK: foo:
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; CHECK: leaq (%rdi), %rax
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; CHECK-NEXT: movl %esi, %ecx
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; CHECK-NEXT: monitor
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; WIN64: foo:
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; WIN64: leaq (%rcx), %rax
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; WIN64-NEXT: movl %edx, %ecx
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; WIN64-NEXT: movl %r8d, %edx
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; WIN64-NEXT: monitor
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define void @foo(i8* %P, i32 %E, i32 %H) nounwind {
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entry:
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tail call void @llvm.x86.sse3.monitor(i8* %P, i32 %E, i32 %H)
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ret void
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}
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declare void @llvm.x86.sse3.monitor(i8*, i32, i32) nounwind
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; CHECK: bar:
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; CHECK: movl %edi, %ecx
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; CHECK-NEXT: movl %esi, %eax
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; CHECK-NEXT: mwait
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; WIN64: bar:
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; WIN64: movl %edx, %eax
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; WIN64-NEXT: mwait
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define void @bar(i32 %E, i32 %H) nounwind {
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entry:
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tail call void @llvm.x86.sse3.mwait(i32 %E, i32 %H)
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ret void
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}
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declare void @llvm.x86.sse3.mwait(i32, i32) nounwind
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