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 2
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; RUN: llc < %s -mtriple=riscv64 -mattr=+a | FileCheck %s
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define ptr @cmpxchg_masked_and_branch1(ptr %ptr, i8 signext %cmp, i8 signext %val) nounwind {
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; CHECK-LABEL: cmpxchg_masked_and_branch1:
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; CHECK: # %bb.0: # %do_cmpxchg
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; CHECK-NEXT: andi a3, a0, -4
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; CHECK-NEXT: slli a4, a0, 3
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; CHECK-NEXT: li a5, 255
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; CHECK-NEXT: zext.b a1, a1
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; CHECK-NEXT: zext.b a2, a2
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; CHECK-NEXT: sllw a5, a5, a4
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; CHECK-NEXT: sllw a1, a1, a4
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; CHECK-NEXT: sllw a2, a2, a4
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; CHECK-NEXT: .LBB0_3: # %do_cmpxchg
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: lr.w.aqrl a4, (a3)
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; CHECK-NEXT: and a6, a4, a5
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; CHECK-NEXT: bne a6, a1, .LBB0_5
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; CHECK-NEXT: # %bb.4: # %do_cmpxchg
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; CHECK-NEXT: # in Loop: Header=BB0_3 Depth=1
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; CHECK-NEXT: xor a6, a4, a2
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; CHECK-NEXT: and a6, a6, a5
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; CHECK-NEXT: xor a6, a4, a6
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; CHECK-NEXT: sc.w.rl a6, a6, (a3)
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; CHECK-NEXT: bnez a6, .LBB0_3
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; CHECK-NEXT: .LBB0_5: # %do_cmpxchg
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; CHECK-NEXT: and a2, a4, a5
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; CHECK-NEXT: bne a1, a2, .LBB0_2
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; CHECK-NEXT: # %bb.1: # %returnptr
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; CHECK-NEXT: xor a1, a1, a2
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; CHECK-NEXT: snez a1, a1
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; CHECK-NEXT: addi a1, a1, -1
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; CHECK-NEXT: and a0, a1, a0
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; CHECK-NEXT: ret
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; CHECK-NEXT: .LBB0_2: # %exit
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; CHECK-NEXT: li a0, 0
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; CHECK-NEXT: ret
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do_cmpxchg:
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%0 = cmpxchg ptr %ptr, i8 %cmp, i8 %val seq_cst seq_cst
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%1 = extractvalue { i8, i1 } %0, 1
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%2 = select i1 %1, ptr %ptr, ptr null
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br i1 %1, label %returnptr, label %exit
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returnptr:
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ret ptr %2
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exit:
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ret ptr null
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}
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