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llvm-project/llvm/test/CodeGen/AArch64/global-merge-group-by-use.ll

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[AArch64] Register passes so they can be run by llc Initialize all AArch64-specific passes in the TargetMachine so they can be run by llc. This can lead to conflicts in opt with some command line options that share the same name as the pass, so I took this opportunity to do some cleanups: * rename all relevant command line options from "aarch64-blah" to "aarch64-enable-blah" and update the tests accordingly * run clang-format on their declarations * move all these declarations to a common place (the TargetMachine) as opposed to having them scattered around (AArch64BranchRelaxation and AArch64AddressTypePromotion were the only offenders) llvm-svn: 277322
2016-08-01 13:56:57 +08:00
; RUN: llc -mtriple=aarch64-apple-ios -asm-verbose=false \
; RUN: -aarch64-enable-collect-loh=false -aarch64-enable-global-merge \
; RUN: -global-merge-group-by-use -global-merge-ignore-single-use=false %s \
; RUN: -o - | FileCheck %s
[GlobalMerge] Look at uses to create smaller global sets. Instead of merging everything together, look at the users of GlobalVariables, and try to group them by function, to create sets of globals used "together". Using that information, a less-aggressive alternative is to keep merging everything together *except* globals that are only ever used alone, that is, those for which it's clearly non-profitable to merge with others. In my testing, grouping by Function is too aggressive, but grouping by BasicBlock is too conservative. Anything in-between isn't trivially available, so stick with Function grouping for now. cl::opts are added for testing; both enabled by default. A few of the testcases aren't testing the merging proper, but just various edge cases when merging does occur. Update them to use the previous grouping behavior. Also, one of the tests is unrelated to GlobalMerge; change it accordingly. While there, switch to r234666' flags rather than the brutal -O3. Differential Revision: http://reviews.llvm.org/D8070 llvm-svn: 235249
2015-04-18 09:21:58 +08:00
; We assume that globals of the same size aren't reordered inside a set.
; Check that we create two MergedGlobal instances for two functions using
; disjoint sets of globals
@m1 = internal global i32 0, align 4
@n1 = internal global i32 0, align 4
; CHECK-LABEL: f1:
define void @f1(i32 %a1, i32 %a2) #0 {
Revert "Use private linkage for MergedGlobals variables" on Darwin. This is a partial revert of r244615 (http://reviews.llvm.org/D11942), which caused a major regression in debug info quality. Turning the artificial __MergedGlobal symbols into private symbols (l__MergedGlobal) means that the linker will not include them in the symbol table of the final executable. Without a symbol table entry dsymutil is not be able to process the debug info for any of the merged globals and thus drops the debug info for all of them. This patch is enabling the old behavior for all MachO targets while leaving all other targets unaffected. rdar://problem/29160481 https://reviews.llvm.org/D26531 llvm-svn: 286607
2016-11-12 01:50:09 +08:00
; CHECK-NEXT: adrp x8, [[SET1:__MergedGlobals.[0-9]*]]@PAGE
[GlobalMerge] Look at uses to create smaller global sets. Instead of merging everything together, look at the users of GlobalVariables, and try to group them by function, to create sets of globals used "together". Using that information, a less-aggressive alternative is to keep merging everything together *except* globals that are only ever used alone, that is, those for which it's clearly non-profitable to merge with others. In my testing, grouping by Function is too aggressive, but grouping by BasicBlock is too conservative. Anything in-between isn't trivially available, so stick with Function grouping for now. cl::opts are added for testing; both enabled by default. A few of the testcases aren't testing the merging proper, but just various edge cases when merging does occur. Update them to use the previous grouping behavior. Also, one of the tests is unrelated to GlobalMerge; change it accordingly. While there, switch to r234666' flags rather than the brutal -O3. Differential Revision: http://reviews.llvm.org/D8070 llvm-svn: 235249
2015-04-18 09:21:58 +08:00
; CHECK-NEXT: add x8, x8, [[SET1]]@PAGEOFF
; CHECK-NEXT: stp w0, w1, [x8]
; CHECK-NEXT: ret
store i32 %a1, i32* @m1, align 4
store i32 %a2, i32* @n1, align 4
ret void
}
@m2 = internal global i32 0, align 4
@n2 = internal global i32 0, align 4
@o2 = internal global i32 0, align 4
; CHECK-LABEL: f2:
define void @f2(i32 %a1, i32 %a2, i32 %a3) #0 {
Revert "Use private linkage for MergedGlobals variables" on Darwin. This is a partial revert of r244615 (http://reviews.llvm.org/D11942), which caused a major regression in debug info quality. Turning the artificial __MergedGlobal symbols into private symbols (l__MergedGlobal) means that the linker will not include them in the symbol table of the final executable. Without a symbol table entry dsymutil is not be able to process the debug info for any of the merged globals and thus drops the debug info for all of them. This patch is enabling the old behavior for all MachO targets while leaving all other targets unaffected. rdar://problem/29160481 https://reviews.llvm.org/D26531 llvm-svn: 286607
2016-11-12 01:50:09 +08:00
; CHECK-NEXT: adrp x8, [[SET2:__MergedGlobals.[0-9]*]]@PAGE
[GlobalMerge] Look at uses to create smaller global sets. Instead of merging everything together, look at the users of GlobalVariables, and try to group them by function, to create sets of globals used "together". Using that information, a less-aggressive alternative is to keep merging everything together *except* globals that are only ever used alone, that is, those for which it's clearly non-profitable to merge with others. In my testing, grouping by Function is too aggressive, but grouping by BasicBlock is too conservative. Anything in-between isn't trivially available, so stick with Function grouping for now. cl::opts are added for testing; both enabled by default. A few of the testcases aren't testing the merging proper, but just various edge cases when merging does occur. Update them to use the previous grouping behavior. Also, one of the tests is unrelated to GlobalMerge; change it accordingly. While there, switch to r234666' flags rather than the brutal -O3. Differential Revision: http://reviews.llvm.org/D8070 llvm-svn: 235249
2015-04-18 09:21:58 +08:00
; CHECK-NEXT: add x8, x8, [[SET2]]@PAGEOFF
; CHECK-NEXT: stp w0, w1, [x8]
; CHECK-NEXT: str w2, [x8, #8]
; CHECK-NEXT: ret
store i32 %a1, i32* @m2, align 4
store i32 %a2, i32* @n2, align 4
store i32 %a3, i32* @o2, align 4
ret void
}
; Sanity-check (don't worry about cost models) that we pick the biggest subset
; of all global used "together" directly or indirectly. Here, that means
; merging n3, m4, and n4 together, but ignoring m3.
@m3 = internal global i32 0, align 4
@n3 = internal global i32 0, align 4
; CHECK-LABEL: f3:
define void @f3(i32 %a1, i32 %a2) #0 {
; CHECK-NEXT: adrp x8, _m3@PAGE
Revert "Use private linkage for MergedGlobals variables" on Darwin. This is a partial revert of r244615 (http://reviews.llvm.org/D11942), which caused a major regression in debug info quality. Turning the artificial __MergedGlobal symbols into private symbols (l__MergedGlobal) means that the linker will not include them in the symbol table of the final executable. Without a symbol table entry dsymutil is not be able to process the debug info for any of the merged globals and thus drops the debug info for all of them. This patch is enabling the old behavior for all MachO targets while leaving all other targets unaffected. rdar://problem/29160481 https://reviews.llvm.org/D26531 llvm-svn: 286607
2016-11-12 01:50:09 +08:00
; CHECK-NEXT: adrp x9, [[SET3:__MergedGlobals[0-9]*]]@PAGE
[GlobalMerge] Look at uses to create smaller global sets. Instead of merging everything together, look at the users of GlobalVariables, and try to group them by function, to create sets of globals used "together". Using that information, a less-aggressive alternative is to keep merging everything together *except* globals that are only ever used alone, that is, those for which it's clearly non-profitable to merge with others. In my testing, grouping by Function is too aggressive, but grouping by BasicBlock is too conservative. Anything in-between isn't trivially available, so stick with Function grouping for now. cl::opts are added for testing; both enabled by default. A few of the testcases aren't testing the merging proper, but just various edge cases when merging does occur. Update them to use the previous grouping behavior. Also, one of the tests is unrelated to GlobalMerge; change it accordingly. While there, switch to r234666' flags rather than the brutal -O3. Differential Revision: http://reviews.llvm.org/D8070 llvm-svn: 235249
2015-04-18 09:21:58 +08:00
; CHECK-NEXT: str w0, [x8, _m3@PAGEOFF]
; CHECK-NEXT: str w1, [x9, [[SET3]]@PAGEOFF]
; CHECK-NEXT: ret
store i32 %a1, i32* @m3, align 4
store i32 %a2, i32* @n3, align 4
ret void
}
@m4 = internal global i32 0, align 4
@n4 = internal global i32 0, align 4
; CHECK-LABEL: f4:
define void @f4(i32 %a1, i32 %a2, i32 %a3) #0 {
; CHECK-NEXT: adrp x8, [[SET3]]@PAGE
; CHECK-NEXT: add x8, x8, [[SET3]]@PAGEOFF
[MachineScheduler]Add support for store clustering Perform store clustering just like load clustering. This change add StoreClusterMutation in machine-scheduler. To control StoreClusterMutation, added enableClusterStores() in TargetInstrInfo.h. This is enabled only on AArch64 for now. This change also add support for unscaled stores which were not handled in getMemOpBaseRegImmOfs(). llvm-svn: 266437
2016-04-15 22:58:38 +08:00
; CHECK-NEXT: stp w2, w0, [x8]
; CHECK-NEXT: str w1, [x8, #8]
[GlobalMerge] Look at uses to create smaller global sets. Instead of merging everything together, look at the users of GlobalVariables, and try to group them by function, to create sets of globals used "together". Using that information, a less-aggressive alternative is to keep merging everything together *except* globals that are only ever used alone, that is, those for which it's clearly non-profitable to merge with others. In my testing, grouping by Function is too aggressive, but grouping by BasicBlock is too conservative. Anything in-between isn't trivially available, so stick with Function grouping for now. cl::opts are added for testing; both enabled by default. A few of the testcases aren't testing the merging proper, but just various edge cases when merging does occur. Update them to use the previous grouping behavior. Also, one of the tests is unrelated to GlobalMerge; change it accordingly. While there, switch to r234666' flags rather than the brutal -O3. Differential Revision: http://reviews.llvm.org/D8070 llvm-svn: 235249
2015-04-18 09:21:58 +08:00
; CHECK-NEXT: ret
store i32 %a1, i32* @m4, align 4
store i32 %a2, i32* @n4, align 4
store i32 %a3, i32* @n3, align 4
ret void
}
; Finally, check that we don't do anything with one-element global sets.
@o5 = internal global i32 0, align 4
; CHECK-LABEL: f5:
define void @f5(i32 %a1) #0 {
; CHECK-NEXT: adrp x8, _o5@PAGE
; CHECK-NEXT: str w0, [x8, _o5@PAGEOFF]
; CHECK-NEXT: ret
store i32 %a1, i32* @o5, align 4
ret void
}
; CHECK-DAG: .zerofill __DATA,__bss,_o5,4,2
; CHECK-DAG: .zerofill __DATA,__bss,[[SET1]],8,3
; CHECK-DAG: .zerofill __DATA,__bss,[[SET2]],12,3
; CHECK-DAG: .zerofill __DATA,__bss,[[SET3]],12,3
attributes #0 = { nounwind }