derek.holloway
7502bf64a4
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65 lines
2.2 KiB
LLVM
65 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt < %s -passes=loop-interchange -loop-interchange-profitabilities=ignore -S | FileCheck %s
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@g = global i64 0
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declare void @rd(ptr)
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declare i32 @__gxx_personality_v0(...)
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; The following loops must not be interchanged because the invocation of @rd
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; may read or write the memory.
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;
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define void @invoke_may_rw() personality ptr @__gxx_personality_v0 {
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; CHECK-LABEL: define void @invoke_may_rw() personality ptr @__gxx_personality_v0 {
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; CHECK-NEXT: [[I_HEADER:.*]]:
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; CHECK-NEXT: br label %[[J_HEADER_PREHEADER:.*]]
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; CHECK: [[J_HEADER_PREHEADER]]:
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; CHECK-NEXT: [[I:%.*]] = phi i64 [ 0, %[[I_HEADER]] ], [ [[I_NEXT:%.*]], %[[I_LATCH:.*]] ]
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; CHECK-NEXT: br label %[[J_HEADER:.*]]
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; CHECK: [[J_HEADER]]:
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; CHECK-NEXT: [[J:%.*]] = phi i64 [ 0, %[[J_HEADER_PREHEADER]] ], [ [[TMP0:%.*]], %[[J_LATCH:.*]] ]
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; CHECK-NEXT: invoke void @rd(ptr @g)
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; CHECK-NEXT: to label %[[J_LATCH]] unwind label %[[LP:.*]]
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; CHECK: [[LP]]:
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; CHECK-NEXT: [[L:%.*]] = landingpad { ptr, i32 }
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; CHECK-NEXT: cleanup
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; CHECK-NEXT: br label %[[J_LATCH]]
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; CHECK: [[J_LATCH]]:
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; CHECK-NEXT: [[TMP0]] = add i64 [[J]], 1
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i64 [[TMP0]], 8
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; CHECK-NEXT: br i1 [[TMP1]], label %[[I_LATCH]], label %[[J_HEADER]]
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; CHECK: [[I_LATCH]]:
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; CHECK-NEXT: [[I_NEXT]] = add i64 [[I]], 1
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; CHECK-NEXT: [[EC_I:%.*]] = icmp eq i64 [[I_NEXT]], 8
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; CHECK-NEXT: br i1 [[EC_I]], label %[[EXIT:.*]], label %[[J_HEADER_PREHEADER]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %i.header
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i.header:
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%i = phi i64 [ 0, %entry ], [ %i.next, %i.latch ]
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br label %j.header
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j.header:
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%j = phi i64 [ 0, %i.header ], [ %j.next, %j.latch ]
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invoke void @rd(ptr @g) to label %j.latch unwind label %lp
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lp:
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%l = landingpad { ptr, i32 } cleanup
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br label %j.latch
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j.latch:
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%j.next = add i64 %j, 1
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%ec.j = icmp eq i64 %j.next, 8
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br i1 %ec.j, label %i.latch, label %j.header
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i.latch:
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%i.next = add i64 %i, 1
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%ec.i = icmp eq i64 %i.next, 8
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br i1 %ec.i, label %exit, label %i.header
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exit:
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ret void
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}
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