1; RUN: llc < %s | FileCheck %s 2 3target datalayout = "e-m:e-p:16:16-i32:16-i64:16-f32:16-f64:16-a:8-n8:16-S16" 4target triple = "msp430-generic-generic" 5 6@llvm.used = appending global [1 x ptr] [ptr @ISR], section "llvm.metadata" 7 8; MSP430 EABI p. 3.9 9; Interrupt functions must save all the registers that are used, even those 10; that are normally considered callee-saved. 11 12; To return from an interrupt function, the function must execute the special 13; instruction RETI, which restores the SR register and branches to the PC where 14; the interrupt occurred. 15 16; CHECK: .section __interrupt_vector_2,"ax",@progbits 17; CHECK-NEXT: .short ISR 18 19@g = global float 0.0 20 21define msp430_intrcc void @ISR() #0 { 22entry: 23; CHECK-LABEL: ISR: 24; CHECK: push r4 25; CHECK: push r5 26; CHECK: push r6 27; CHECK: push r7 28; CHECK: push r8 29; CHECK: push r9 30; CHECK: push r10 31; CHECK: push r11 32; CHECK: push r12 33; CHECK: push r13 34; CHECK: push r14 35; CHECK: push r15 36 %t1 = load volatile float, ptr @g 37 %t2 = load volatile float, ptr @g 38 %t3 = load volatile float, ptr @g 39 %t4 = load volatile float, ptr @g 40 %t5 = load volatile float, ptr @g 41 %t6 = load volatile float, ptr @g 42 %t7 = load volatile float, ptr @g 43 store volatile float %t1, ptr @g 44 store volatile float %t2, ptr @g 45 store volatile float %t3, ptr @g 46 store volatile float %t4, ptr @g 47 store volatile float %t5, ptr @g 48 store volatile float %t6, ptr @g 49; CHECK: reti 50 ret void 51} 52 53; Functions without 'interrupt' attribute don't get a vector section. 54; CHECK-NOT: __interrupt_vector 55; CHECK-LABEL: NMI: 56; CHECK: reti 57define msp430_intrcc void @NMI() #1 { 58 ret void 59} 60 61attributes #0 = { noinline nounwind optnone "interrupt"="2" } 62attributes #1 = { noinline nounwind optnone } 63