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| author | Tim Northover <tnorthover@apple.com> | 2013-12-02 14:46:26 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2013-12-02 14:46:26 +0000 |
| commit | ad249171e4fa718290be2f1b276c1b7864dd27f7 (patch) | |
| tree | 8c84c193493f3b420f1a26d015fed7cbe537eaa8 /test | |
| parent | c7cf4869a726ea8f36680d4ef220f9902075dee8 (diff) | |
| download | llvm-ad249171e4fa718290be2f1b276c1b7864dd27f7.tar.gz llvm-ad249171e4fa718290be2f1b276c1b7864dd27f7.tar.bz2 llvm-ad249171e4fa718290be2f1b276c1b7864dd27f7.tar.xz | |
ARM: decide whether to use movw/movt based on "minsize" attribute.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196102 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/ARM/minsize-litpools.ll | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/minsize-litpools.ll b/test/CodeGen/ARM/minsize-litpools.ll new file mode 100644 index 0000000000..d5cd2a9b72 --- /dev/null +++ b/test/CodeGen/ARM/minsize-litpools.ll @@ -0,0 +1,26 @@ +; RUN: llc -mtriple=thumbv7s %s -o - | FileCheck %s +; RUN: llc -mtriple=armv7s %s -o - | FileCheck %s + +; CodeGen should be able to set and reset the MinSize subtarget-feature, and +; make use of it in deciding whether to use MOVW/MOVT for global variables or a +; lit-pool load (saving roughly 2 bytes of code). + +@var = global i32 0 + +define i32 @small_global() minsize { +; CHECK-LABEL: small_global: +; CHECK: ldr r[[GLOBDEST:[0-9]+]], {{.?LCPI0_0}} +; CHECK: ldr r0, [r[[GLOBDEST]]] + + %val = load i32* @var + ret i32 %val +} + +define i32 @big_global() { +; CHECK-LABEL: big_global: +; CHECK: movw [[GLOBDEST:r[0-9]+]], :lower16:var +; CHECK: movt [[GLOBDEST]], :upper16:var + + %val = load i32* @var + ret i32 %val +} |