derek.holloway
7502bf64a4
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49 lines
1.6 KiB
LLVM
49 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
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; RUN: llc --mtriple=loongarch64 -O3 < %s | FileCheck %s --check-prefix=DEFAULT
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; RUN: llc --mtriple=loongarch64 -O3 -loongarch-disable-reloc-sched < %s | FileCheck %s --check-prefix=NOSCHED
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@g = external global i32
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define i32 @boundary_test(i32 %a, i32 %b) {
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; DEFAULT-LABEL: boundary_test:
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; DEFAULT: # %bb.0: # %entry
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; DEFAULT-NEXT: pcalau12i $a2, %got_pc_hi20(g)
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; DEFAULT-NEXT: ld.d $a2, $a2, %got_pc_lo12(g)
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; DEFAULT-NEXT: mul.d $a3, $a0, $a1
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; DEFAULT-NEXT: ld.w $a2, $a2, 0
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; DEFAULT-NEXT: addi.w $a1, $a1, 0
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; DEFAULT-NEXT: addi.w $a0, $a0, 0
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; DEFAULT-NEXT: div.w $a0, $a0, $a1
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; DEFAULT-NEXT: add.d $a0, $a3, $a0
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; DEFAULT-NEXT: add.w $a0, $a0, $a2
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; DEFAULT-NEXT: ret
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;
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; NOSCHED-LABEL: boundary_test:
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; NOSCHED: # %bb.0: # %entry
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; NOSCHED-NEXT: mul.d $a2, $a0, $a1
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; NOSCHED-NEXT: pcalau12i $a3, %got_pc_hi20(g)
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; NOSCHED-NEXT: ld.d $a3, $a3, %got_pc_lo12(g)
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; NOSCHED-NEXT: ld.w $a3, $a3, 0
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; NOSCHED-NEXT: addi.w $a1, $a1, 0
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; NOSCHED-NEXT: addi.w $a0, $a0, 0
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; NOSCHED-NEXT: div.w $a0, $a0, $a1
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; NOSCHED-NEXT: add.d $a0, $a2, $a0
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; NOSCHED-NEXT: add.w $a0, $a0, $a3
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; NOSCHED-NEXT: ret
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entry:
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; Mul is fast, but without scheduling boundary it might be scheduled after the long latency load address setup
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%x = mul i32 %a, %b
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; Load global (pcalau12i) - this has target flags so it becomes a boundary with -loongarch-disable-reloc-sched
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%v = load i32, ptr @g
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; Div is slow
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%y = sdiv i32 %a, %b
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%s1 = add i32 %x, %y
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%s2 = add i32 %s1, %v
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ret i32 %s2
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}
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