5e0a06b34d
Moving these into the middle-end pipeline will allow for additional optimization of the expansion result, such as CSE of redundant loads (c.f. https://godbolt.org/z/bEna4Md9r). For now, we conservatively place the passes at the end of the middle-end pipeline, so we mostly don't benefit from additional optimizations yet. The pipeline position will be moved in a future change. This builds on work done by legrosbuffle in https://reviews.llvm.org/D60318. --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
35 lines
1.1 KiB
LLVM
35 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: opt -passes=expand-memcmp -mtriple=loongarch64 -mattr=+d -S < %s | llc --mtriple=loongarch64 -mattr=+d | FileCheck %s
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;; Before getSelectionDAGInfo() interface hooks were defined DAGBuilder
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;; would crash.
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define signext i32 @test1(ptr %buffer1, ptr %buffer2) {
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; CHECK-LABEL: test1:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: ld.d $a2, $a0, 0
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; CHECK-NEXT: ld.d $a3, $a1, 0
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; CHECK-NEXT: revb.d $a2, $a2
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; CHECK-NEXT: revb.d $a3, $a3
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; CHECK-NEXT: bne $a2, $a3, .LBB0_3
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; CHECK-NEXT: # %bb.1: # %loadbb1
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; CHECK-NEXT: ld.d $a0, $a0, 8
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; CHECK-NEXT: ld.d $a1, $a1, 8
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; CHECK-NEXT: revb.d $a2, $a0
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; CHECK-NEXT: revb.d $a3, $a1
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; CHECK-NEXT: bne $a2, $a3, .LBB0_3
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; CHECK-NEXT: # %bb.2:
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; CHECK-NEXT: move $a0, $zero
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; CHECK-NEXT: ret
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; CHECK-NEXT: .LBB0_3: # %res_block
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; CHECK-NEXT: sltu $a0, $a2, $a3
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; CHECK-NEXT: sub.d $a0, $zero, $a0
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; CHECK-NEXT: ori $a0, $a0, 1
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; CHECK-NEXT: ret
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entry:
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%call = call signext i32 @memcmp(ptr %buffer1, ptr %buffer2, i64 16)
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ret i32 %call
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}
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declare signext i32 @memcmp(ptr, ptr, i64)
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