xref: /aosp_15_r20/external/llvm/test/CodeGen/PowerPC/allocate-r0.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=g5 | FileCheck %s
2*9880d681SAndroid Build Coastguard Workertarget datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
3*9880d681SAndroid Build Coastguard Workertarget triple = "powerpc64-unknown-linux-gnu"
4*9880d681SAndroid Build Coastguard Worker
5*9880d681SAndroid Build Coastguard Workerdefine i64 @foo(i64 %a) nounwind {
6*9880d681SAndroid Build Coastguard Workerentry:
7*9880d681SAndroid Build Coastguard Worker  call void asm sideeffect "", "~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12}"() nounwind
8*9880d681SAndroid Build Coastguard Worker  br label %return
9*9880d681SAndroid Build Coastguard Worker
10*9880d681SAndroid Build Coastguard Worker; CHECK: @foo
11*9880d681SAndroid Build Coastguard Worker; Because r0 is allocatable, we can use it to hold r3 without spilling.
12*9880d681SAndroid Build Coastguard Worker; CHECK: mr 0, 3
13*9880d681SAndroid Build Coastguard Worker; CHECK: mr 3, 0
14*9880d681SAndroid Build Coastguard Worker
15*9880d681SAndroid Build Coastguard Workerreturn:                                           ; preds = %entry
16*9880d681SAndroid Build Coastguard Worker  ret i64 %a
17*9880d681SAndroid Build Coastguard Worker}
18*9880d681SAndroid Build Coastguard Worker
19