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TheRock/compiler/amd-llvm/llvm/test/Transforms/LoopInterchange/outer-latch-phi.ll
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2026-09-02 16:34:47 -07:00

57 lines
2.0 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt < %s -passes=loop-interchange -loop-interchange-profitabilities=ignore -S | FileCheck %s
; Ensure that the pass doesn't crash when the outer latch contains PHI nodes
; with more than one incoming values.
define void @f(i1 %cond) {
; CHECK-LABEL: define void @f(
; CHECK-SAME: i1 [[COND:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br label %[[OUTER_HEADER:.*]]
; CHECK: [[OUTER_HEADER]]:
; CHECK-NEXT: [[I:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[I_INC:%.*]], %[[OUTER_LATCH:.*]] ]
; CHECK-NEXT: br i1 [[COND]], label %[[OUTER_LATCH]], label %[[INNER_PREHEADER:.*]]
; CHECK: [[INNER_PREHEADER]]:
; CHECK-NEXT: br label %[[INNER:.*]]
; CHECK: [[INNER]]:
; CHECK-NEXT: [[J:%.*]] = phi i64 [ [[J_INC:%.*]], %[[INNER]] ], [ 0, %[[INNER_PREHEADER]] ]
; CHECK-NEXT: [[J_INC]] = add i64 [[J]], 1
; CHECK-NEXT: [[EC_J:%.*]] = icmp eq i64 [[J_INC]], 10
; CHECK-NEXT: br i1 [[EC_J]], label %[[OUTER_BODY:.*]], label %[[INNER]]
; CHECK: [[OUTER_BODY]]:
; CHECK-NEXT: br label %[[OUTER_LATCH]]
; CHECK: [[OUTER_LATCH]]:
; CHECK-NEXT: [[P:%.*]] = phi i64 [ [[I]], %[[OUTER_HEADER]] ], [ 10, %[[OUTER_BODY]] ]
; CHECK-NEXT: [[I_INC]] = add i64 [[I]], 1
; CHECK-NEXT: [[EC_I:%.*]] = icmp eq i64 [[I_INC]], 10
; CHECK-NEXT: br i1 [[EC_I]], label %[[EXIT:.*]], label %[[OUTER_HEADER]]
; CHECK: [[EXIT]]:
; CHECK-NEXT: ret void
;
entry:
br label %outer.header
outer.header:
%i = phi i64 [ 0, %entry ], [ %i.inc, %outer.latch ]
br i1 %cond, label %outer.latch, label %inner
inner:
%j = phi i64 [ 0, %outer.header ], [ %j.inc, %inner ]
%j.inc = add i64 %j, 1
%ec.j = icmp eq i64 %j.inc, 10
br i1 %ec.j, label %outer.body, label %inner
outer.body:
br label %outer.latch
outer.latch:
%p = phi i64 [ %i, %outer.header ], [ 10, %outer.body ]
%i.inc = add i64 %i, 1
%ec.i = icmp eq i64 %i.inc, 10
br i1 %ec.i, label %exit, label %outer.header
exit:
ret void
}