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| author | Austin <zhenhangwang@huawei.com> | 2025-11-16 03:20:27 +0800 |
|---|---|---|
| committer | Austin <zhenhangwang@huawei.com> | 2025-11-16 03:20:27 +0800 |
| commit | 3705921f60914df3cfb59e088cf9e476fe7992b7 (patch) | |
| tree | fbcac6d8be76365f9cec1814b318116acf115f57 /llvm/test/CodeGen/ARM | |
| parent | d3439138e158541b65f3d759f5071a445d3297f2 (diff) | |
[CodeGen] add a command to force global merge
I found that in some performance scenarios, such as under O2, this pr can be helpful for a series of loading global variables.
Diffstat (limited to 'llvm/test/CodeGen/ARM')
| -rw-r--r-- | llvm/test/CodeGen/ARM/force-global-merge.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/force-global-merge.ll b/llvm/test/CodeGen/ARM/force-global-merge.ll new file mode 100644 index 000000000000..a7b791dc0a63 --- /dev/null +++ b/llvm/test/CodeGen/ARM/force-global-merge.ll @@ -0,0 +1,23 @@ +; RUN: llc -mtriple=arm-eabi -force-enable-global-merge %s -o - | FileCheck %s + +@g_value1 = dso_local local_unnamed_addr global i32 0, align 4 +@g_value2 = dso_local local_unnamed_addr global i32 0, align 4 +@g_value3 = dso_local local_unnamed_addr global i32 0, align 4 +@g_value4 = dso_local local_unnamed_addr global i32 0, align 4 + +define dso_local i32 @foo1() local_unnamed_addr { +entry: + %0 = load i32, ptr @g_value1, align 4 + %1 = load i32, ptr @g_value2, align 4 + %2 = load i32, ptr @g_value3, align 4 + %3 = load i32, ptr @g_value4, align 4 + %call = tail call i32 @foo(i32 %0, i32 %1, i32 %2, i32 %3) + ret i32 %call +} + +declare i32 @foo(i32, i32, i32, i32) + +; CHECK: ldr [[BASE:r[0-9]+]], .LCPI0_0 +; CHECK: ldm [[BASE]], {[[R0:r[0-9]+]], [[R1:r[0-9]+]], [[R2:r[0-9]+]], [[R3:r[0-9]+]]} +; CHECK: .LCPI0_0: +; CHECK-NEXT: .long .L_MergedGlobals |