derek.holloway
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95 lines
3.1 KiB
LLVM
95 lines
3.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
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; RUN: llc < %s -mtriple=riscv64 | FileCheck %s --check-prefixes=CHECK-NOZBB
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; RUN: llc < %s -mtriple=riscv64 -mattr=+zbb | FileCheck %s --check-prefixes=CHECK-ZBB
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; This test case miscompiled for ZBB (DAGCombiner turned a SELECT into a more
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; poisonous AND operation).
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define i1 @pr84653(i32 %x) {
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; CHECK-NOZBB-LABEL: pr84653:
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; CHECK-NOZBB: # %bb.0:
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; CHECK-NOZBB-NEXT: sext.w a1, a0
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; CHECK-NOZBB-NEXT: lui a2, 524288
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; CHECK-NOZBB-NEXT: sgtz a3, a1
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; CHECK-NOZBB-NEXT: addi a2, a2, -1
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; CHECK-NOZBB-NEXT: xor a0, a0, a2
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; CHECK-NOZBB-NEXT: sext.w a0, a0
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; CHECK-NOZBB-NEXT: slt a0, a0, a1
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; CHECK-NOZBB-NEXT: and a0, a3, a0
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; CHECK-NOZBB-NEXT: ret
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;
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; CHECK-ZBB-LABEL: pr84653:
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; CHECK-ZBB: # %bb.0:
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; CHECK-ZBB-NEXT: sext.w a1, a0
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; CHECK-ZBB-NEXT: lui a2, 524288
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; CHECK-ZBB-NEXT: xnor a0, a0, a2
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; CHECK-ZBB-NEXT: sext.w a0, a0
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; CHECK-ZBB-NEXT: max a0, a0, zero
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; CHECK-ZBB-NEXT: slt a0, a0, a1
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; CHECK-ZBB-NEXT: ret
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%cmp1 = icmp sgt i32 %x, 0
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%sub = sub nsw i32 2147483647, %x ; 0x7fffffff
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%cmp2 = icmp sgt i32 %x, %sub
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%r = select i1 %cmp1, i1 %cmp2, i1 false
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ret i1 %r
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}
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; This test case miscompiled for ZBB (DAGCombiner turned a SELECT into a more
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; poisonous AND operation).
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define i1 @pr85190(i64 %a) {
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; CHECK-NOZBB-LABEL: pr85190:
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; CHECK-NOZBB: # %bb.0:
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; CHECK-NOZBB-NEXT: ori a1, a0, 7
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; CHECK-NOZBB-NEXT: srli a2, a0, 63
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; CHECK-NOZBB-NEXT: li a3, -1
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; CHECK-NOZBB-NEXT: slli a3, a3, 63
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; CHECK-NOZBB-NEXT: sub a3, a3, a1
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; CHECK-NOZBB-NEXT: slt a0, a0, a3
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; CHECK-NOZBB-NEXT: and a0, a2, a0
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; CHECK-NOZBB-NEXT: ret
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;
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; CHECK-ZBB-LABEL: pr85190:
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; CHECK-ZBB: # %bb.0:
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; CHECK-ZBB-NEXT: ori a1, a0, 7
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; CHECK-ZBB-NEXT: li a2, -1
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; CHECK-ZBB-NEXT: slli a2, a2, 63
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; CHECK-ZBB-NEXT: sub a2, a2, a1
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; CHECK-ZBB-NEXT: min a1, a2, zero
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; CHECK-ZBB-NEXT: slt a0, a0, a1
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; CHECK-ZBB-NEXT: ret
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%or = or i64 %a, 7
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%cmp1 = icmp slt i64 %a, 0
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%sub = sub nsw i64 -9223372036854775808, %or ; 0x8000000000000000
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%cmp2 = icmp sgt i64 %sub, %a
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%res = select i1 %cmp1, i1 %cmp2, i1 false
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ret i1 %res
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}
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define i1 @select_to_or(i32 %x) {
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; CHECK-NOZBB-LABEL: select_to_or:
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; CHECK-NOZBB: # %bb.0:
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; CHECK-NOZBB-NEXT: sext.w a1, a0
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; CHECK-NOZBB-NEXT: lui a2, 524288
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; CHECK-NOZBB-NEXT: sgtz a3, a1
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; CHECK-NOZBB-NEXT: addi a2, a2, -1
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; CHECK-NOZBB-NEXT: xor a0, a0, a2
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; CHECK-NOZBB-NEXT: sext.w a0, a0
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; CHECK-NOZBB-NEXT: slt a0, a0, a1
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; CHECK-NOZBB-NEXT: or a0, a3, a0
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; CHECK-NOZBB-NEXT: ret
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;
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; CHECK-ZBB-LABEL: select_to_or:
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; CHECK-ZBB: # %bb.0:
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; CHECK-ZBB-NEXT: sext.w a1, a0
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; CHECK-ZBB-NEXT: lui a2, 524288
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; CHECK-ZBB-NEXT: xnor a0, a0, a2
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; CHECK-ZBB-NEXT: sext.w a0, a0
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; CHECK-ZBB-NEXT: min a0, a0, zero
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; CHECK-ZBB-NEXT: slt a0, a0, a1
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; CHECK-ZBB-NEXT: ret
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%cmp1 = icmp sgt i32 %x, 0
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%sub = sub nsw i32 2147483647, %x ; 0x7fffffff
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%cmp2 = icmp sgt i32 %x, %sub
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%r = select i1 %cmp1, i1 true, i1 %cmp2
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ret i1 %r
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}
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