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| author | John Brawn <john.brawn@arm.com> | 2015-08-03 12:13:33 +0000 |
|---|---|---|
| committer | John Brawn <john.brawn@arm.com> | 2015-08-03 12:13:33 +0000 |
| commit | f3324cf1a53853303556878375fecba01bb75261 (patch) | |
| tree | f5bc4431e98f6a0fb9d36afd6b57b4928ccb62cf /llvm/test/CodeGen/ARM/global-merge-external.ll | |
| parent | 8b954241f85b8383fb8725b0a1108c55f31f14e9 (diff) | |
| download | bcm5719-llvm-f3324cf1a53853303556878375fecba01bb75261.tar.gz bcm5719-llvm-f3324cf1a53853303556878375fecba01bb75261.zip | |
[ARM] Make GlobalMerge merge extern globals by default
Enabling merging of extern globals appears to be generally either beneficial or
harmless. On some benchmarks suites (on Cortex-M4F, Cortex-A9, and Cortex-A57)
it gives improvements in the 1-5% range, but in the rest the overall effect is
zero.
Differential Revision: http://reviews.llvm.org/D10966
llvm-svn: 243874
Diffstat (limited to 'llvm/test/CodeGen/ARM/global-merge-external.ll')
| -rw-r--r-- | llvm/test/CodeGen/ARM/global-merge-external.ll | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/global-merge-external.ll b/llvm/test/CodeGen/ARM/global-merge-external.ll new file mode 100644 index 00000000000..acc778999a8 --- /dev/null +++ b/llvm/test/CodeGen/ARM/global-merge-external.ll @@ -0,0 +1,48 @@ +; RUN: llc < %s -mtriple=arm-eabi -arm-global-merge | FileCheck %s --check-prefix=CHECK-MERGE +; RUN: llc < %s -mtriple=arm-eabi -arm-global-merge -global-merge-on-external=true | FileCheck %s --check-prefix=CHECK-MERGE +; RUN: llc < %s -mtriple=arm-eabi -arm-global-merge -global-merge-on-external=false | FileCheck %s --check-prefix=CHECK-NO-MERGE +; RUN: llc < %s -mtriple=arm-macho -arm-global-merge | FileCheck %s --check-prefix=CHECK-NO-MERGE + +@x = global i32 0, align 4 +@y = global i32 0, align 4 +@z = global i32 0, align 4 + +define void @f1(i32 %a1, i32 %a2) { +;CHECK: f1: +;CHECK: ldr {{r[0-9]+}}, [[LABEL1:\.LCPI[0-9]+_[0-9]]] +;CHECK: [[LABEL1]]: +;CHECK-MERGE: .long _MergedGlobals_x +;CHECK-NO-MERGE: .long {{_?x}} + store i32 %a1, i32* @x, align 4 + store i32 %a2, i32* @y, align 4 + ret void +} + +define void @g1(i32 %a1, i32 %a2) { +;CHECK: g1: +;CHECK: ldr {{r[0-9]+}}, [[LABEL2:\.LCPI[0-9]+_[0-9]]] +;CHECK: [[LABEL2]]: +;CHECK-MERGE: .long _MergedGlobals_x +;CHECK-NO-MERGE: .long {{_?y}} + store i32 %a1, i32* @y, align 4 + store i32 %a2, i32* @z, align 4 + ret void +} + +;CHECK-NO-MERGE-NOT: .globl _MergedGlobals_x + +;CHECK-MERGE: .type _MergedGlobals_x,%object +;CHECK-MERGE: .globl _MergedGlobals_x +;CHECK-MERGE: .align 2 +;CHECK-MERGE: _MergedGlobals_x: +;CHECK-MERGE: .size _MergedGlobals_x, 12 + +;CHECK-MERGE: .globl x +;CHECK-MERGE: x = _MergedGlobals_x +;CHECK-MERGE: .size x, 4 +;CHECK-MERGE: .globl y +;CHECK-MERGE: y = _MergedGlobals_x+4 +;CHECK-MERGE: .size y, 4 +;CHECK-MERGE: .globl z +;CHECK-MERGE: z = _MergedGlobals_x+8 +;CHECK-MERGE: .size z, 4 |
