1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc -mtriple=arm64ec-pc-windows-msvc -arm64ec-generate-thunks=false < %s | FileCheck %s 3 4; Make sure we're reserving all the registers that are supposed to be 5; reserved. Integer regs x13, x15, x23, x24, x28. Float regs v16-v31. 6; We confirm this by ensuring that we spill if and only if none of the 7; unreserved registers are available. 8 9define i32 @no_int_regs(i32 %x) nounwind { 10; CHECK-LABEL: no_int_regs: 11; CHECK: // %bb.0: // %entry 12; CHECK-NEXT: stp x30, x29, [sp, #-80]! // 16-byte Folded Spill 13; CHECK-NEXT: str x27, [sp, #16] // 8-byte Folded Spill 14; CHECK-NEXT: stp x26, x25, [sp, #32] // 16-byte Folded Spill 15; CHECK-NEXT: stp x22, x21, [sp, #48] // 16-byte Folded Spill 16; CHECK-NEXT: stp x20, x19, [sp, #64] // 16-byte Folded Spill 17; CHECK-NEXT: str w0, [sp, #28] // 4-byte Folded Spill 18; CHECK-NEXT: //APP 19; CHECK-NEXT: //NO_APP 20; CHECK-NEXT: ldp x20, x19, [sp, #64] // 16-byte Folded Reload 21; CHECK-NEXT: ldr w0, [sp, #28] // 4-byte Folded Reload 22; CHECK-NEXT: ldp x22, x21, [sp, #48] // 16-byte Folded Reload 23; CHECK-NEXT: ldr x27, [sp, #16] // 8-byte Folded Reload 24; CHECK-NEXT: ldp x26, x25, [sp, #32] // 16-byte Folded Reload 25; CHECK-NEXT: ldp x30, x29, [sp], #80 // 16-byte Folded Reload 26; CHECK-NEXT: ret 27entry: 28 tail call void asm sideeffect "", "~{x0},~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7},~{x8},~{x9},~{x10},~{x11},~{x12},~{x15},~{x16},~{x17},~{x19},~{x20},~{x21},~{x22},~{x25},~{x26},~{x27},~{fp},~{lr}"() 29 ret i32 %x 30} 31 32define i32 @one_int_reg(i32 %x) nounwind { 33; CHECK-LABEL: one_int_reg: 34; CHECK: // %bb.0: // %entry 35; CHECK-NEXT: stp x30, x29, [sp, #-80]! // 16-byte Folded Spill 36; CHECK-NEXT: str x27, [sp, #16] // 8-byte Folded Spill 37; CHECK-NEXT: mov w30, w0 38; CHECK-NEXT: stp x26, x25, [sp, #32] // 16-byte Folded Spill 39; CHECK-NEXT: stp x22, x21, [sp, #48] // 16-byte Folded Spill 40; CHECK-NEXT: stp x20, x19, [sp, #64] // 16-byte Folded Spill 41; CHECK-NEXT: //APP 42; CHECK-NEXT: //NO_APP 43; CHECK-NEXT: ldp x20, x19, [sp, #64] // 16-byte Folded Reload 44; CHECK-NEXT: ldr x27, [sp, #16] // 8-byte Folded Reload 45; CHECK-NEXT: ldp x22, x21, [sp, #48] // 16-byte Folded Reload 46; CHECK-NEXT: mov w0, w30 47; CHECK-NEXT: ldp x26, x25, [sp, #32] // 16-byte Folded Reload 48; CHECK-NEXT: ldp x30, x29, [sp], #80 // 16-byte Folded Reload 49; CHECK-NEXT: ret 50entry: 51 tail call void asm sideeffect "", "~{x0},~{x1},~{x2},~{x3},~{x4},~{x5},~{x6},~{x7},~{x8},~{x9},~{x10},~{x11},~{x12},~{x15},~{x16},~{x17},~{x19},~{x20},~{x21},~{x22},~{x25},~{x26},~{x27},~{fp}"() 52 ret i32 %x 53} 54 55define float @no_float_regs(float %x) nounwind { 56; CHECK-LABEL: no_float_regs: 57; CHECK: // %bb.0: // %entry 58; CHECK-NEXT: sub sp, sp, #80 59; CHECK-NEXT: stp d15, d14, [sp, #16] // 16-byte Folded Spill 60; CHECK-NEXT: stp d13, d12, [sp, #32] // 16-byte Folded Spill 61; CHECK-NEXT: stp d11, d10, [sp, #48] // 16-byte Folded Spill 62; CHECK-NEXT: stp d9, d8, [sp, #64] // 16-byte Folded Spill 63; CHECK-NEXT: str s0, [sp, #12] // 4-byte Folded Spill 64; CHECK-NEXT: //APP 65; CHECK-NEXT: //NO_APP 66; CHECK-NEXT: ldp d9, d8, [sp, #64] // 16-byte Folded Reload 67; CHECK-NEXT: ldr s0, [sp, #12] // 4-byte Folded Reload 68; CHECK-NEXT: ldp d11, d10, [sp, #48] // 16-byte Folded Reload 69; CHECK-NEXT: ldp d13, d12, [sp, #32] // 16-byte Folded Reload 70; CHECK-NEXT: ldp d15, d14, [sp, #16] // 16-byte Folded Reload 71; CHECK-NEXT: add sp, sp, #80 72; CHECK-NEXT: ret 73entry: 74 tail call void asm sideeffect "", "~{v0},~{v1},~{v2},~{v3},~{v4},~{v5},~{v6},~{v7},~{v8},~{v9},~{v10},~{v11},~{v12},~{v13},~{v14},~{v15}"() 75 ret float %x 76} 77 78define float @one_float_reg(float %x) nounwind { 79; CHECK-LABEL: one_float_reg: 80; CHECK: // %bb.0: // %entry 81; CHECK-NEXT: stp d15, d14, [sp, #-64]! // 16-byte Folded Spill 82; CHECK-NEXT: fmov s15, s0 83; CHECK-NEXT: stp d13, d12, [sp, #16] // 16-byte Folded Spill 84; CHECK-NEXT: stp d11, d10, [sp, #32] // 16-byte Folded Spill 85; CHECK-NEXT: stp d9, d8, [sp, #48] // 16-byte Folded Spill 86; CHECK-NEXT: //APP 87; CHECK-NEXT: //NO_APP 88; CHECK-NEXT: ldp d9, d8, [sp, #48] // 16-byte Folded Reload 89; CHECK-NEXT: ldp d11, d10, [sp, #32] // 16-byte Folded Reload 90; CHECK-NEXT: fmov s0, s15 91; CHECK-NEXT: ldp d13, d12, [sp, #16] // 16-byte Folded Reload 92; CHECK-NEXT: ldp d15, d14, [sp], #64 // 16-byte Folded Reload 93; CHECK-NEXT: ret 94entry: 95 tail call void asm sideeffect "", "~{v0},~{v1},~{v2},~{v3},~{v4},~{v5},~{v6},~{v7},~{v8},~{v9},~{v10},~{v11},~{v12},~{v13},~{v14}"() 96 ret float %x 97} 98 99