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35e8055393
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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235249 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
1.0 KiB
LLVM
36 lines
1.0 KiB
LLVM
; RUN: llc %s -mtriple=armv7-linux-gnueabi -filetype=obj -o - | \
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; RUN: llvm-readobj -s -t | FileCheck -check-prefix=OBJ %s
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; RUN: llc %s -mtriple=armv7-linux-gnueabi -o - | \
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; RUN: FileCheck -check-prefix=ASM %s
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@dummy = internal global i32 666
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@array00 = internal global [80 x i8] zeroinitializer, align 1
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@sum = internal global i32 55
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@STRIDE = internal global i32 8
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; ASM: .type array00,%object @ @array00
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; ASM-NEXT: .local array00
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; ASM-NEXT: .comm array00,80,1
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; ASM-NEXT: .type sum,%object @ @sum
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; OBJ: Symbols [
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; OBJ: Symbol {
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; OBJ: Name: array00
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; OBJ-NEXT: Value: 0x0
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; OBJ-NEXT: Size: 80
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; OBJ-NEXT: Binding: Local
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; OBJ-NEXT: Type: Object
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; OBJ-NEXT: Other: 0
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; OBJ-NEXT: Section: .bss
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define i32 @main(i32 %argc) nounwind {
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%1 = load i32, i32* @sum, align 4
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%2 = getelementptr [80 x i8], [80 x i8]* @array00, i32 0, i32 %argc
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%3 = load i8, i8* %2
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%4 = zext i8 %3 to i32
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%5 = add i32 %1, %4
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ret i32 %5
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}
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