| Tim Northover | dee8604 | 2013-12-02 14:46:26 +0000 | [diff] [blame^] | 1 | ; RUN: llc -mtriple=thumbv7s %s -o - | FileCheck %s |
| 2 | ; RUN: llc -mtriple=armv7s %s -o - | FileCheck %s |
| 3 | |
| 4 | ; CodeGen should be able to set and reset the MinSize subtarget-feature, and |
| 5 | ; make use of it in deciding whether to use MOVW/MOVT for global variables or a |
| 6 | ; lit-pool load (saving roughly 2 bytes of code). |
| 7 | |
| 8 | @var = global i32 0 |
| 9 | |
| 10 | define i32 @small_global() minsize { |
| 11 | ; CHECK-LABEL: small_global: |
| 12 | ; CHECK: ldr r[[GLOBDEST:[0-9]+]], {{.?LCPI0_0}} |
| 13 | ; CHECK: ldr r0, [r[[GLOBDEST]]] |
| 14 | |
| 15 | %val = load i32* @var |
| 16 | ret i32 %val |
| 17 | } |
| 18 | |
| 19 | define i32 @big_global() { |
| 20 | ; CHECK-LABEL: big_global: |
| 21 | ; CHECK: movw [[GLOBDEST:r[0-9]+]], :lower16:var |
| 22 | ; CHECK: movt [[GLOBDEST]], :upper16:var |
| 23 | |
| 24 | %val = load i32* @var |
| 25 | ret i32 %val |
| 26 | } |