51 lines
2.2 KiB
LLVM
51 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 -p indvars -S %s | FileCheck %s
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declare i1 @cond()
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define i64 @test_ptr_compare_guard(ptr %start, ptr %end) {
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; CHECK-LABEL: define i64 @test_ptr_compare_guard(
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; CHECK-SAME: ptr [[START:%.*]], ptr [[END:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[C_0:%.*]] = icmp eq ptr [[START]], [[END]]
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; CHECK-NEXT: br i1 [[C_0]], label %[[EXIT:.*]], label %[[LOOP_HEADER_PREHEADER:.*]]
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; CHECK: [[LOOP_HEADER_PREHEADER]]:
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; CHECK-NEXT: br label %[[LOOP_HEADER:.*]]
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; CHECK: [[LOOP_HEADER]]:
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; CHECK-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[LOOP_HEADER_PREHEADER]] ]
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; CHECK-NEXT: [[I64_IV:%.*]] = phi i64 [ [[I64_IV_NEXT:%.*]], %[[LOOP_LATCH]] ], [ 0, %[[LOOP_HEADER_PREHEADER]] ]
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; CHECK-NEXT: [[C_1:%.*]] = call i1 @cond()
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; CHECK-NEXT: br i1 [[C_1]], label %[[LOOP_LATCH]], label %[[EXIT_LOOPEXIT:.*]]
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; CHECK: [[LOOP_LATCH]]:
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; CHECK-NEXT: [[PTR_IV_NEXT]] = getelementptr i8, ptr [[PTR_IV]], i64 1
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; CHECK-NEXT: [[I64_IV_NEXT]] = add i64 [[I64_IV]], 1
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; CHECK-NEXT: [[C_2:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]
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; CHECK-NEXT: br i1 [[C_2]], label %[[EXIT_LOOPEXIT]], label %[[LOOP_HEADER]]
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; CHECK: [[EXIT_LOOPEXIT]]:
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; CHECK-NEXT: [[RES_PH:%.*]] = phi i64 [ 0, %[[LOOP_HEADER]] ], [ [[I64_IV]], %[[LOOP_LATCH]] ]
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; CHECK-NEXT: br label %[[EXIT]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: [[RES:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[RES_PH]], %[[EXIT_LOOPEXIT]] ]
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; CHECK-NEXT: ret i64 [[RES]]
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;
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entry:
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%c.0 = icmp eq ptr %start, %end
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br i1 %c.0, label %exit, label %loop.header
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loop.header:
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%ptr.iv = phi ptr [ %start, %entry ], [ %ptr.iv.next, %loop.latch ]
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%i64.iv = phi i64 [ 0, %entry ], [ %i64.iv.next, %loop.latch ]
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%c.1 = call i1 @cond()
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br i1 %c.1, label %loop.latch, label %exit
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loop.latch:
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%ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 1
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%i64.iv.next = add i64 %i64.iv, 1
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%c.2 = icmp eq ptr %ptr.iv.next, %end
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br i1 %c.2, label %exit, label %loop.header
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exit:
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%res = phi i64 [ 0, %entry ], [ %i64.iv, %loop.latch ], [ 0, %loop.header ]
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ret i64 %res
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}
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