derek.holloway
7502bf64a4
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76 lines
3.0 KiB
LLVM
76 lines
3.0 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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; This is a test for the assert that checks that we only replace phis iff the
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; phi-uses are in the loop nest exit or the incoming value is defined in the
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; inner header. We only want to check this when the user is a phi, which does
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; not always need to be the case.
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define i64 @non_phi_lcssa_phi_user(ptr %A) {
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; CHECK-LABEL: define i64 @non_phi_lcssa_phi_user(
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; CHECK-SAME: ptr [[A:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br label %[[INNER_PREHEADER:.*]]
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; CHECK: [[OUTER_HEADER_PREHEADER:.*]]:
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; CHECK-NEXT: br label %[[OUTER_HEADER:.*]]
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; CHECK: [[OUTER_HEADER]]:
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; CHECK-NEXT: [[I:%.*]] = phi i64 [ [[I_NEXT:%.*]], %[[OUTER_LATCH:.*]] ], [ 0, %[[OUTER_HEADER_PREHEADER]] ]
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; CHECK-NEXT: br label %[[INNER_SPLIT1:.*]]
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; CHECK: [[INNER_PREHEADER]]:
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; CHECK-NEXT: br label %[[INNER:.*]]
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; CHECK: [[INNER]]:
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; CHECK-NEXT: [[J:%.*]] = phi i64 [ [[TMP1:%.*]], %[[INNER_SPLIT:.*]] ], [ 0, %[[INNER_PREHEADER]] ]
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; CHECK-NEXT: br label %[[OUTER_HEADER_PREHEADER]]
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; CHECK: [[INNER_SPLIT1]]:
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; CHECK-NEXT: [[PTR:%.*]] = getelementptr inbounds [100 x i32], ptr [[A]], i64 [[J]], i64 [[I]]
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; CHECK-NEXT: store i32 0, ptr [[PTR]], align 4
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; CHECK-NEXT: [[J_NEXT:%.*]] = add i64 [[J]], 1
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; CHECK-NEXT: [[EXITCOND_INNER:%.*]] = icmp eq i64 [[J]], 99
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; CHECK-NEXT: br label %[[INNER_EXIT:.*]]
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; CHECK: [[INNER_SPLIT]]:
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; CHECK-NEXT: [[TMP0:%.*]] = phi i64 [ [[USE_J:%.*]], %[[OUTER_LATCH]] ]
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; CHECK-NEXT: [[TMP1]] = add i64 [[J]], 1
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; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[J]], 99
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; CHECK-NEXT: br i1 [[TMP2]], label %[[EXIT:.*]], label %[[INNER]]
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; CHECK: [[INNER_EXIT]]:
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; CHECK-NEXT: br label %[[OUTER_LATCH]]
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; CHECK: [[OUTER_LATCH]]:
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; CHECK-NEXT: [[USE_J]] = add i64 [[J]], 1
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; CHECK-NEXT: [[I_NEXT]] = add i64 [[I]], 1
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; CHECK-NEXT: [[EXITCOND_OUTER:%.*]] = icmp eq i64 [[I]], 99
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; CHECK-NEXT: br i1 [[EXITCOND_OUTER]], label %[[INNER_SPLIT]], label %[[OUTER_HEADER]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[RESULT:%.*]] = phi i64 [ [[TMP0]], %[[INNER_SPLIT]] ]
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; CHECK-NEXT: ret i64 [[RESULT]]
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;
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entry:
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br label %outer.header
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outer.header:
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%i = phi i64 [ 0, %entry ], [ %i.next, %outer.latch ]
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br label %inner
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inner:
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%j = phi i64 [ 0, %outer.header ], [ %j.next, %inner ]
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%ptr = getelementptr inbounds [100 x i32], ptr %A, i64 %j, i64 %i
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store i32 0, ptr %ptr
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%j.next = add i64 %j, 1
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%exitcond.inner = icmp eq i64 %j, 99
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br i1 %exitcond.inner, label %inner.exit, label %inner
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inner.exit:
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%j.lcssa = phi i64 [ %j, %inner ]
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br label %outer.latch
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outer.latch:
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%j.latch = phi i64 [ %j.lcssa, %inner.exit ]
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%use.j = add i64 %j.latch, 1
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%i.next = add i64 %i, 1
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%exitcond.outer = icmp eq i64 %i, 99
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br i1 %exitcond.outer, label %exit, label %outer.header
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exit:
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%result = phi i64 [ %use.j, %outer.latch ]
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ret i64 %result
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}
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