| ; RUN: llc -march=mipsel -O0 -relocation-model=pic < %s | FileCheck %s |
| ; Check that register scavenging spill slot is close to $fp. |
| target triple="mipsel--" |
| |
| ; FIXME: After recent rework to FastISel, don't know how to trigger the |
| ; emergency spill slot. Filed PR48301. |
| ; XFAIL: * |
| @var = external global i32 |
| @ptrvar = external global ptr |
| |
| ; CHECK-LABEL: func: |
| define void @func() { |
| %space = alloca i32, align 4 |
| %stackspace = alloca[16384 x i32], align 4 |
| |
| ; ensure stackspace is not optimized out |
| store volatile ptr %stackspace, ptr @ptrvar |
| |
| ; Load values to increase register pressure. |
| %v0 = load volatile i32, ptr @var |
| %v1 = load volatile i32, ptr @var |
| %v2 = load volatile i32, ptr @var |
| %v3 = load volatile i32, ptr @var |
| %v4 = load volatile i32, ptr @var |
| %v5 = load volatile i32, ptr @var |
| %v6 = load volatile i32, ptr @var |
| %v7 = load volatile i32, ptr @var |
| %v8 = load volatile i32, ptr @var |
| %v9 = load volatile i32, ptr @var |
| %v10 = load volatile i32, ptr @var |
| %v11 = load volatile i32, ptr @var |
| %v12 = load volatile i32, ptr @var |
| %v13 = load volatile i32, ptr @var |
| %v14 = load volatile i32, ptr @var |
| %v15 = load volatile i32, ptr @var |
| %v16 = load volatile i32, ptr @var |
| |
| ; Computing a stack-relative values needs an additional register. |
| ; We should get an emergency spill/reload for this. |
| ; CHECK: sw ${{.*}}, 0($sp) |
| ; CHECK: lw ${{.*}}, 0($sp) |
| store volatile i32 %v0, ptr %space |
| |
| ; store values so they are used. |
| store volatile i32 %v0, ptr @var |
| store volatile i32 %v1, ptr @var |
| store volatile i32 %v2, ptr @var |
| store volatile i32 %v3, ptr @var |
| store volatile i32 %v4, ptr @var |
| store volatile i32 %v5, ptr @var |
| store volatile i32 %v6, ptr @var |
| store volatile i32 %v7, ptr @var |
| store volatile i32 %v8, ptr @var |
| store volatile i32 %v9, ptr @var |
| store volatile i32 %v10, ptr @var |
| store volatile i32 %v11, ptr @var |
| store volatile i32 %v12, ptr @var |
| store volatile i32 %v13, ptr @var |
| store volatile i32 %v14, ptr @var |
| store volatile i32 %v15, ptr @var |
| store volatile i32 %v16, ptr @var |
| |
| ret void |
| } |