242 lines
6.9 KiB
LLVM
242 lines
6.9 KiB
LLVM
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; RUN: llc < %s -march=xcore | FileCheck %s
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; RUN: llc < %s -march=xcore -frame-pointer=all | FileCheck %s -check-prefix=CHECKFP
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; When using SP for small frames, we don't need any scratch registers (SR).
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; When using SP for large frames, we may need two scratch registers.
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; When using FP, for large or small frames, we may need one scratch register.
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; FP + small frame: spill FP+SR = entsp 2
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; CHECKFP-LABEL: f1:
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; CHECKFP: entsp 2
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; CHECKFP-NEXT: stw r10, sp[1]
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; CHECKFP-NEXT: ldaw r10, sp[0]
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; CHECKFP: set sp, r10
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; CHECKFP-NEXT: ldw r10, sp[1]
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; CHECKFP-NEXT: retsp 2
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;
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; !FP + small frame: no spills = no stack adjustment needed
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; CHECK-LABEL: f1:
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; CHECK: stw lr, sp[0]
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; CHECK: ldw lr, sp[0]
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; CHECK-NEXT: retsp 0
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define void @f1() nounwind {
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entry:
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tail call void asm sideeffect "", "~{lr}"() nounwind
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ret void
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}
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; FP + small frame: spill FP+SR+R0+LR = entsp 3 + extsp 1
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; CHECKFP-LABEL: f3:
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; CHECKFP: entsp 3
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; CHECKFP-NEXT: stw r10, sp[1]
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; CHECKFP-NEXT: ldaw r10, sp[0]
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; CHECKFP-NEXT: stw [[REG:r[4-9]+]], r10[2]
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; CHECKFP-NEXT: mov [[REG]], r0
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; CHECKFP-NEXT: extsp 1
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; CHECKFP-NEXT: bl f2
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; CHECKFP-NEXT: ldaw sp, sp[1]
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; CHECKFP-NEXT: mov r0, [[REG]]
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; CHECKFP-NEXT: ldw [[REG]], r10[2]
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; CHECKFP-NEXT: set sp, r10
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; CHECKFP-NEXT: ldw r10, sp[1]
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; CHECKFP-NEXT: retsp 3
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;
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; !FP + small frame: spill R0+LR = entsp 2
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; CHECK-LABEL: f3:
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; CHECK: entsp 2
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; CHECK-NEXT: stw [[REG:r[4-9]+]], sp[1]
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; CHECK-NEXT: mov [[REG]], r0
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; CHECK-NEXT: bl f2
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; CHECK-NEXT: mov r0, [[REG]]
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; CHECK-NEXT: ldw [[REG]], sp[1]
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; CHECK-NEXT: retsp 2
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declare void @f2()
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define i32 @f3(i32 %i) nounwind {
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entry:
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call void @f2()
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ret i32 %i
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}
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; FP + large frame: spill FP+SR = entsp 2 + 100000
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; CHECKFP-LABEL: f4:
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; CHECKFP: entsp 65535
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; CHECKFP-NEXT: .cfi_def_cfa_offset 262140
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; CHECKFP-NEXT: .cfi_offset 15, 0
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; CHECKFP-NEXT: extsp 34467
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; CHECKFP-NEXT: .cfi_def_cfa_offset 400008
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; CHECKFP-NEXT: stw r10, sp[1]
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; CHECKFP-NEXT: .cfi_offset 10, -400004
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; CHECKFP-NEXT: ldaw r10, sp[0]
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; CHECKFP-NEXT: .cfi_def_cfa_register 10
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; CHECKFP-NEXT: set sp, r10
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; CHECKFP-NEXT: ldw r10, sp[1]
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; CHECKFP-NEXT: ldaw sp, sp[65535]
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; CHECKFP-NEXT: retsp 34467
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;
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; !FP + large frame: spill SR+SR = entsp 2 + 100000
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; CHECK-LABEL: f4:
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; CHECK: entsp 65535
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; CHECK-NEXT: .cfi_def_cfa_offset 262140
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; CHECK-NEXT: .cfi_offset 15, 0
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; CHECK-NEXT: extsp 34467
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; CHECK-NEXT: .cfi_def_cfa_offset 400008
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; CHECK-NEXT: ldaw sp, sp[65535]
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; CHECK-NEXT: retsp 34467
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define void @f4() {
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entry:
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%0 = alloca [100000 x i32]
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ret void
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}
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; FP + large frame: spill FP+SR+R4+LR = entsp 3 + 200000 + extsp 1
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; CHECKFP: .section .cp.rodata.cst4,"aMc",@progbits,4
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; CHECKFP-NEXT: .p2align 2
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; CHECKFP-NEXT: .LCPI[[CNST0:[0-9_]+]]:
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; CHECKFP-NEXT: .long 200002
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; CHECKFP-NEXT: .LCPI[[CNST1:[0-9_]+]]:
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; CHECKFP-NEXT: .long 200001
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; CHECKFP-NEXT: .text
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; CHECKFP-LABEL: f6:
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; CHECKFP: entsp 65535
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; CHECKFP-NEXT: .cfi_def_cfa_offset 262140
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; CHECKFP-NEXT: .cfi_offset 15, 0
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; CHECKFP-NEXT: extsp 65535
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; CHECKFP-NEXT: .cfi_def_cfa_offset 524280
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; CHECKFP-NEXT: extsp 65535
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; CHECKFP-NEXT: .cfi_def_cfa_offset 786420
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; CHECKFP-NEXT: extsp 3398
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; CHECKFP-NEXT: .cfi_def_cfa_offset 800012
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; CHECKFP-NEXT: stw r10, sp[1]
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; CHECKFP-NEXT: .cfi_offset 10, -800008
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; CHECKFP-NEXT: ldaw r10, sp[0]
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; CHECKFP-NEXT: .cfi_def_cfa_register 10
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; CHECKFP-NEXT: ldw r1, cp[.LCPI[[CNST0]]]
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; CHECKFP-NEXT: stw [[REG:r[4-9]+]], r10[r1]
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; CHECKFP-NEXT: .cfi_offset 4, -4
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; CHECKFP-NEXT: mov [[REG]], r0
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; CHECKFP-NEXT: extsp 1
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; CHECKFP-NEXT: ldaw r0, r10[2]
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; CHECKFP-NEXT: bl f5
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; CHECKFP-NEXT: ldaw sp, sp[1]
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; CHECKFP-NEXT: ldw r1, cp[.LCPI3_1]
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; CHECKFP-NEXT: ldaw r0, r10[r1]
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; CHECKFP-NEXT: extsp 1
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; CHECKFP-NEXT: bl f5
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; CHECKFP-NEXT: ldaw sp, sp[1]
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; CHECKFP-NEXT: mov r0, [[REG]]
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; CHECKFP-NEXT: ldw r1, cp[.LCPI[[CNST0]]]
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; CHECKFP-NEXT: ldw [[REG]], r10[r1]
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; CHECKFP-NEXT: set sp, r10
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; CHECKFP-NEXT: ldw r10, sp[1]
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; CHECKFP-NEXT: ldaw sp, sp[65535]
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; CHECKFP-NEXT: ldaw sp, sp[65535]
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; CHECKFP-NEXT: ldaw sp, sp[65535]
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; CHECKFP-NEXT: retsp 3398
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;
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; !FP + large frame: spill SR+SR+R4+LR = entsp 4 + 200000
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; CHECK: .section .cp.rodata.cst4,"aMc",@progbits,4
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; CHECK-NEXT: .p2align 2
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; CHECK-NEXT: .LCPI[[CNST0:[0-9_]+]]:
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; CHECK-NEXT: .long 200003
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; CHECK-NEXT: .LCPI[[CNST1:[0-9_]+]]:
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; CHECK-NEXT: .long 200002
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; CHECK-NEXT: .text
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; CHECK-LABEL: f6:
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; CHECK: entsp 65535
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; CHECK-NEXT: .cfi_def_cfa_offset 262140
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; CHECK-NEXT: .cfi_offset 15, 0
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; CHECK-NEXT: extsp 65535
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; CHECK-NEXT: .cfi_def_cfa_offset 524280
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; CHECK-NEXT: extsp 65535
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; CHECK-NEXT: .cfi_def_cfa_offset 786420
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; CHECK-NEXT: extsp 3399
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; CHECK-NEXT: .cfi_def_cfa_offset 800016
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; CHECK-NEXT: ldaw r1, sp[0]
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; CHECK-NEXT: ldw r2, cp[.LCPI[[CNST0]]]
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; CHECK-NEXT: stw [[REG:r[4-9]+]], r1[r2]
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; CHECK-NEXT: .cfi_offset 4, -4
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; CHECK-NEXT: mov [[REG]], r0
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; CHECK-NEXT: ldaw r0, sp[3]
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; CHECK-NEXT: bl f5
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; CHECK-NEXT: ldaw r0, sp[0]
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; CHECK-NEXT: ldw r1, cp[.LCPI[[CNST1]]]
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; CHECK-NEXT: ldaw r0, r0[r1]
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; CHECK-NEXT: bl f5
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; CHECK-NEXT: mov r0, [[REG]]
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; CHECK-NEXT: ldaw [[REG]], sp[0]
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; CHECK-NEXT: ldw r1, cp[.LCPI[[CNST0]]]
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; CHECK-NEXT: ldw [[REG]], [[REG]][r1]
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; CHECK-NEXT: ldaw sp, sp[65535]
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; CHECK-NEXT: ldaw sp, sp[65535]
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; CHECK-NEXT: ldaw sp, sp[65535]
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; CHECK-NEXT: retsp 3399
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declare void @f5(i32*)
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define i32 @f6(i32 %i) {
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entry:
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%0 = alloca [200000 x i32]
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%1 = getelementptr inbounds [200000 x i32], [200000 x i32]* %0, i32 0, i32 0
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call void @f5(i32* %1)
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%2 = getelementptr inbounds [200000 x i32], [200000 x i32]* %0, i32 0, i32 199999
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call void @f5(i32* %2)
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ret i32 %i
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}
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; FP + large frame: spill FP+SR+LR = entsp 2 + 256 + extsp 1
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; CHECKFP-LABEL: f8:
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; CHECKFP: entsp 258
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; CHECKFP-NEXT: stw r10, sp[1]
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; CHECKFP-NEXT: ldaw r10, sp[0]
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; CHECKFP-NEXT: mkmsk [[REG:r[0-9]+]], 8
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; CHECKFP-NEXT: ldaw r0, r10{{\[}}[[REG]]{{\]}}
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; CHECKFP-NEXT: extsp 1
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; CHECKFP-NEXT: bl f5
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; CHECKFP-NEXT: ldaw sp, sp[1]
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; CHECKFP-NEXT: set sp, r10
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; CHECKFP-NEXT: ldw r10, sp[1]
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; CHECKFP-NEXT: retsp 258
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;
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; !FP + large frame: spill SR+SR+LR = entsp 3 + 256
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; CHECK-LABEL: f8:
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; CHECK: entsp 257
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; CHECK-NEXT: ldaw r0, sp[254]
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; CHECK-NEXT: bl f5
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; CHECK-NEXT: retsp 257
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define void @f8() nounwind {
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entry:
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%0 = alloca [256 x i32]
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%1 = getelementptr inbounds [256 x i32], [256 x i32]* %0, i32 0, i32 253
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call void @f5(i32* %1)
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ret void
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}
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; FP + large frame: spill FP+SR+LR = entsp 2 + 32768 + extsp 1
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; CHECKFP-LABEL: f9:
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; CHECKFP: entsp 32770
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; CHECKFP-NEXT: stw r10, sp[1]
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; CHECKFP-NEXT: ldaw r10, sp[0]
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; CHECKFP-NEXT: ldc [[REG:r[0-9]+]], 32767
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; CHECKFP-NEXT: ldaw r0, r10{{\[}}[[REG]]{{\]}}
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; CHECKFP-NEXT: extsp 1
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; CHECKFP-NEXT: bl f5
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; CHECKFP-NEXT: ldaw sp, sp[1]
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; CHECKFP-NEXT: set sp, r10
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; CHECKFP-NEXT: ldw r10, sp[1]
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; CHECKFP-NEXT: retsp 32770
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;
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; !FP + large frame: spill SR+SR+LR = entsp 3 + 32768
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; CHECK-LABEL: f9:
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; CHECK: entsp 32771
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; CHECK-NEXT: ldaw r0, sp[32768]
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; CHECK-NEXT: bl f5
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; CHECK-NEXT: retsp 32771
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define void @f9() nounwind {
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entry:
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%0 = alloca [32768 x i32]
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%1 = getelementptr inbounds [32768 x i32], [32768 x i32]* %0, i32 0, i32 32765
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call void @f5(i32* %1)
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ret void
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}
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