| ; RUN: llc -mtriple=x86_64-unknown-unknown < %s | FileCheck %s |
| ; RUN: llc -mtriple=x86_64-unknown-unknown -O0 < %s | FileCheck %s |
| ; RUN: llc -mtriple=i686-unknown-unknown -mattr=+sse2 < %s | FileCheck %s |
| ; RUN: llc -mtriple=i686-unknown-unknown -mattr=+sse2 -O0 < %s | FileCheck %s |
| |
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| ;; In functions with 'no_caller_saved_registers' attribute, all registers should |
| ;; be preserved except for registers used for passing/returning arguments. |
| ;; The test checks that function "bar" preserves xmm0 register. |
| ;; It also checks that caller function "foo" does not store registers for callee |
| ;; "bar". For example, there is no store/load/access to xmm registers. |
| ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| |
| define i32 @bar(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7, i32 %a8) #0 { |
| ; CHECK-LABEL: bar |
| ; CHECK: mov{{.*}} %xmm0 |
| ; CHECK: mov{{.*}} {{.*}}, %xmm0 |
| ; CHECK: ret |
| call void asm sideeffect "", "~{xmm0}"() |
| ret i32 1 |
| } |
| |
| define x86_intrcc void @foo(i8* nocapture readnone %c) { |
| ; CHECK-LABEL: foo |
| ; CHECK-NOT: xmm |
| entry: |
| tail call i32 @bar(i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8) #0 |
| ret void |
| } |
| |
| attributes #0 = { "no_caller_saved_registers" } |