065e0324e5
Loading constants inline is expensive on CSKY and it's in general better to place the constant nearby in code space and then it can be loaded with a simple 16/32 bit load instruction like lrw. It needs lift or duplicates constant pool entry to make constant nearby so that lrw instruction can reach.
102 lines
4.2 KiB
LLVM
102 lines
4.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs -csky-no-aliases < %s -mtriple=csky -mattr=+2e3 | FileCheck %s
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; RUN: llc -verify-machineinstrs -csky-no-aliases < %s -mtriple=csky -relocation-model=pic -code-model=small -mattr=+2e3 | FileCheck %s --check-prefix=CHECK-PIC-SMALL
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; RUN: llc -verify-machineinstrs -csky-no-aliases < %s -mtriple=csky -relocation-model=pic -code-model=large -mattr=+2e3 | FileCheck %s --check-prefix=CHECK-PIC-LARGE
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@f.a = private unnamed_addr constant [2 x i8*] [i8* blockaddress(@f, %return), i8* blockaddress(@f, %l2)], align 16
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define i32 @f(i32 %x) #0 {
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; CHECK-LABEL: f:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: lrw32 a1, [.LCPI0_0]
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; CHECK-NEXT: ldr32.w a0, (a1, a0 << 2)
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; CHECK-NEXT: jmp32 a0
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; CHECK-NEXT: .Ltmp0: # Block address taken
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; CHECK-NEXT: .LBB0_1: # %return
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; CHECK-NEXT: movi16 a0, 1
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; CHECK-NEXT: rts16
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; CHECK-NEXT: .Ltmp1: # Block address taken
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; CHECK-NEXT: .LBB0_2: # %l2
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; CHECK-NEXT: movi16 a0, 2
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; CHECK-NEXT: rts16
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; CHECK-NEXT: .p2align 1
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; CHECK-NEXT: # %bb.3:
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; CHECK-NEXT: .p2align 2
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; CHECK-NEXT: .LCPI0_0:
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; CHECK-NEXT: .long .Lf.a
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;
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; CHECK-PIC-SMALL-LABEL: f:
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; CHECK-PIC-SMALL: # %bb.0: # %entry
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; CHECK-PIC-SMALL-NEXT: subi16 sp, sp, 4
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; CHECK-PIC-SMALL-NEXT: .cfi_def_cfa_offset 4
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; CHECK-PIC-SMALL-NEXT: st32.w rgb, (sp, 0) # 4-byte Folded Spill
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; CHECK-PIC-SMALL-NEXT: .cfi_offset rgb, -4
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; CHECK-PIC-SMALL-NEXT: .cfi_def_cfa_offset 4
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; CHECK-PIC-SMALL-NEXT: lrw32 rgb, [.LCPI0_0]
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; CHECK-PIC-SMALL-NEXT: lrw32 a1, [.LCPI0_1]
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; CHECK-PIC-SMALL-NEXT: addu32 a1, rgb, a1
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; CHECK-PIC-SMALL-NEXT: ldr32.w a0, (a1, a0 << 2)
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; CHECK-PIC-SMALL-NEXT: jmp32 a0
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; CHECK-PIC-SMALL-NEXT: .Ltmp0: # Block address taken
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; CHECK-PIC-SMALL-NEXT: .LBB0_1: # %return
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; CHECK-PIC-SMALL-NEXT: movi16 a0, 1
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; CHECK-PIC-SMALL-NEXT: br32 .LBB0_3
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; CHECK-PIC-SMALL-NEXT: .Ltmp1: # Block address taken
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; CHECK-PIC-SMALL-NEXT: .LBB0_2: # %l2
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; CHECK-PIC-SMALL-NEXT: movi16 a0, 2
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; CHECK-PIC-SMALL-NEXT: .LBB0_3: # %.split
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; CHECK-PIC-SMALL-NEXT: ld32.w rgb, (sp, 0) # 4-byte Folded Reload
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; CHECK-PIC-SMALL-NEXT: addi16 sp, sp, 4
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; CHECK-PIC-SMALL-NEXT: rts16
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; CHECK-PIC-SMALL-NEXT: .p2align 1
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; CHECK-PIC-SMALL-NEXT: # %bb.4:
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; CHECK-PIC-SMALL-NEXT: .p2align 2
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; CHECK-PIC-SMALL-NEXT: .LCPI0_0:
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; CHECK-PIC-SMALL-NEXT: .long _GLOBAL_OFFSET_TABLE_
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; CHECK-PIC-SMALL-NEXT: .LCPI0_1:
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; CHECK-PIC-SMALL-NEXT: .long .Lf.a@GOTOFF
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;
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; CHECK-PIC-LARGE-LABEL: f:
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; CHECK-PIC-LARGE: # %bb.0: # %entry
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; CHECK-PIC-LARGE-NEXT: subi16 sp, sp, 4
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; CHECK-PIC-LARGE-NEXT: .cfi_def_cfa_offset 4
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; CHECK-PIC-LARGE-NEXT: st32.w rgb, (sp, 0) # 4-byte Folded Spill
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; CHECK-PIC-LARGE-NEXT: .cfi_offset rgb, -4
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; CHECK-PIC-LARGE-NEXT: .cfi_def_cfa_offset 4
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; CHECK-PIC-LARGE-NEXT: lrw32 rgb, [.LCPI0_0]
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; CHECK-PIC-LARGE-NEXT: lrw32 a1, [.LCPI0_1]
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; CHECK-PIC-LARGE-NEXT: addu32 a1, rgb, a1
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; CHECK-PIC-LARGE-NEXT: ldr32.w a0, (a1, a0 << 2)
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; CHECK-PIC-LARGE-NEXT: jmp32 a0
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; CHECK-PIC-LARGE-NEXT: .Ltmp0: # Block address taken
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; CHECK-PIC-LARGE-NEXT: .LBB0_1: # %return
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; CHECK-PIC-LARGE-NEXT: movi16 a0, 1
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; CHECK-PIC-LARGE-NEXT: br32 .LBB0_3
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; CHECK-PIC-LARGE-NEXT: .Ltmp1: # Block address taken
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; CHECK-PIC-LARGE-NEXT: .LBB0_2: # %l2
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; CHECK-PIC-LARGE-NEXT: movi16 a0, 2
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; CHECK-PIC-LARGE-NEXT: .LBB0_3: # %.split
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; CHECK-PIC-LARGE-NEXT: ld32.w rgb, (sp, 0) # 4-byte Folded Reload
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; CHECK-PIC-LARGE-NEXT: addi16 sp, sp, 4
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; CHECK-PIC-LARGE-NEXT: rts16
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; CHECK-PIC-LARGE-NEXT: .p2align 1
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; CHECK-PIC-LARGE-NEXT: # %bb.4:
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; CHECK-PIC-LARGE-NEXT: .p2align 2
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; CHECK-PIC-LARGE-NEXT: .LCPI0_0:
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; CHECK-PIC-LARGE-NEXT: .long _GLOBAL_OFFSET_TABLE_
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; CHECK-PIC-LARGE-NEXT: .LCPI0_1:
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; CHECK-PIC-LARGE-NEXT: .long .Lf.a@GOTOFF
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entry:
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%idxprom = sext i32 %x to i64
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%arrayidx = getelementptr inbounds [2 x i8*], [2 x i8*]* @f.a, i64 0, i64 %idxprom
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%0 = load i8*, i8** %arrayidx, align 8
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indirectbr i8* %0, [label %return, label %l2]
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l2: ; preds = %entry
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br label %return
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return: ; preds = %entry, %l2
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%retval.0 = phi i32 [ 2, %l2 ], [ 1, %entry ]
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ret i32 %retval.0
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}
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