4cf187b5b4
This commit allows the outliner to avoid saving and restoring the link register on AArch64 when it is dead within an entire class of candidates. This introduces changes to the way the outliner interfaces with the target. For example, the target now interfaces with the outliner using a MachineOutlinerInfo struct rather than by using getOutliningCallOverhead and getOutliningFrameOverhead. This also improves several comments on the outliner's cost model. https://reviews.llvm.org/D36721 llvm-svn: 314341
112 lines
2.9 KiB
LLVM
112 lines
2.9 KiB
LLVM
; RUN: llc -enable-machine-outliner -mtriple=x86_64-apple-darwin < %s | FileCheck %s
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@x = global i32 0, align 4
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define i32 @check_boundaries() #0 {
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; CHECK-LABEL: _check_boundaries:
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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%4 = alloca i32, align 4
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%5 = alloca i32, align 4
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store i32 0, i32* %1, align 4
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store i32 0, i32* %2, align 4
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%6 = load i32, i32* %2, align 4
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%7 = icmp ne i32 %6, 0
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br i1 %7, label %9, label %8
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; CHECK: callq [[OFUNC1:l_OUTLINED_FUNCTION_[0-9]+]]
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; CHECK: cmpl $0, -{{[0-9]+}}(%rbp)
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store i32 1, i32* %2, align 4
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store i32 2, i32* %3, align 4
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store i32 3, i32* %4, align 4
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store i32 4, i32* %5, align 4
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br label %10
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store i32 1, i32* %4, align 4
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br label %10
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%11 = load i32, i32* %2, align 4
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%12 = icmp ne i32 %11, 0
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br i1 %12, label %14, label %13
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; CHECK: callq [[OFUNC1]]
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store i32 1, i32* %2, align 4
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store i32 2, i32* %3, align 4
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store i32 3, i32* %4, align 4
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store i32 4, i32* %5, align 4
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br label %15
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store i32 1, i32* %4, align 4
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br label %15
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ret i32 0
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}
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define i32 @empty_1() #0 {
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; CHECK-LABEL: _empty_1:
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; CHECK-NOT: callq l_OUTLINED_FUNCTION_{{[0-9]+}}
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ret i32 1
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}
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define i32 @empty_2() #0 {
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; CHECK-LABEL: _empty_2
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; CHECK-NOT: callq l_OUTLINED_FUNCTION_{{[0-9]+}}
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ret i32 1
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}
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define i32 @no_empty_outlining() #0 {
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; CHECK-LABEL: _no_empty_outlining:
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%1 = alloca i32, align 4
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store i32 0, i32* %1, align 4
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; CHECK-NOT: callq l_OUTLINED_FUNCTION_{{[0-9]+}}
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%2 = call i32 @empty_1() #1
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%3 = call i32 @empty_2() #1
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%4 = call i32 @empty_1() #1
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%5 = call i32 @empty_2() #1
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%6 = call i32 @empty_1() #1
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%7 = call i32 @empty_2() #1
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ret i32 0
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}
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define i32 @main() #0 {
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; CHECK-LABEL: _main:
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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%4 = alloca i32, align 4
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%5 = alloca i32, align 4
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store i32 0, i32* %1, align 4
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store i32 0, i32* @x, align 4
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; CHECK: callq [[OFUNC2:l_OUTLINED_FUNCTION_[0-9]+]]
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store i32 1, i32* %2, align 4
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store i32 2, i32* %3, align 4
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store i32 3, i32* %4, align 4
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store i32 4, i32* %5, align 4
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store i32 1, i32* @x, align 4
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call void asm sideeffect "", "~{memory},~{dirflag},~{fpsr},~{flags}"()
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; CHECK: callq [[OFUNC2]]
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store i32 1, i32* %2, align 4
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store i32 2, i32* %3, align 4
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store i32 3, i32* %4, align 4
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store i32 4, i32* %5, align 4
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ret i32 0
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}
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attributes #0 = { noredzone nounwind ssp uwtable "no-frame-pointer-elim"="true" }
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; CHECK-LABEL: l_OUTLINED_FUNCTION_{{[0-9]+}}:
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; CHECK: movl $1, -{{[0-9]+}}(%rbp)
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; CHECK-NEXT: movl $2, -{{[0-9]+}}(%rbp)
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; CHECK-NEXT: movl $3, -{{[0-9]+}}(%rbp)
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; CHECK-NEXT: movl $4, -{{[0-9]+}}(%rbp)
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; CHECK-NEXT: retq
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; CHECK-LABEL: l_OUTLINED_FUNCTION_{{[0-9]+}}:
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; CHECK: movl $1, -{{[0-9]+}}(%rbp)
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; CHECK-NEXT: movl $2, -{{[0-9]+}}(%rbp)
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; CHECK-NEXT: movl $3, -{{[0-9]+}}(%rbp)
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; CHECK-NEXT: movl $4, -{{[0-9]+}}(%rbp)
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; CHECK-NEXT: retq
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