42 lines
1.3 KiB
LLVM
42 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -passes='loop(loop-rotate),instcombine' -enable-knowledge-retention -S < %s | FileCheck %s
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%0 = type { ptr }
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define ptr @f1(ptr %i0) {
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; CHECK-LABEL: define ptr @f1(
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; CHECK-SAME: ptr [[I0:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[I21:%.*]] = icmp eq ptr [[I0]], null
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; CHECK-NEXT: br i1 [[I21]], label %[[EXIT:.*]], label %[[LOOP_LATCH_LR_PH:.*]]
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; CHECK: [[LOOP_LATCH_LR_PH]]:
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; CHECK-NEXT: br label %[[LOOP_LATCH:.*]]
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; CHECK: [[LOOP_LATCH]]:
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; CHECK-NEXT: [[I3:%.*]] = phi ptr [ [[I0]], %[[LOOP_LATCH_LR_PH]] ], [ [[I5:%.*]], %[[LOOP_LATCH]] ]
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; CHECK-NEXT: [[I5]] = load ptr, ptr [[I3]], align 8
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; CHECK-NEXT: [[I2:%.*]] = icmp eq ptr [[I5]], null
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; CHECK-NEXT: br i1 [[I2]], label %[[LOOP_EXIT_CRIT_EDGE:.*]], label %[[LOOP_LATCH]]
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; CHECK: [[LOOP_EXIT_CRIT_EDGE]]:
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; CHECK-NEXT: br label %[[EXIT]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret ptr undef
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;
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entry:
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br label %loop
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loop:
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%i = phi ptr [ %i0, %entry ], [ %i5, %loop.latch ]
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%i2 = icmp eq ptr %i, null
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br i1 %i2, label %exit, label %loop.latch
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loop.latch:
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call void @llvm.assume(i1 true) [ "nonnull"(ptr %i) ]
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%i5 = load ptr, ptr %i, align 8
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br label %loop
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exit:
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ret ptr undef
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}
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declare void @llvm.assume(i1)
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