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