100 lines
3 KiB
LLVM
100 lines
3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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declare i1 @cond()
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declare void @clobber()
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define void @test_unreachable_latch(ptr %start, ptr %b) {
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; CHECK-LABEL: define void @test_unreachable_latch
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; CHECK-SAME: (ptr [[START:%.*]], ptr [[B:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
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; CHECK: loop.header:
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; CHECK-NEXT: [[NODE_1:%.*]] = phi ptr [ [[START]], [[ENTRY:%.*]] ], [ null, [[LOOP_LATCH:%.*]] ]
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; CHECK-NEXT: [[C_0:%.*]] = icmp ne ptr [[NODE_1]], null
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; CHECK-NEXT: br i1 [[C_0]], label [[THEN:%.*]], label [[EXIT:%.*]]
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; CHECK: loop.latch:
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; CHECK-NEXT: call void @clobber()
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; CHECK-NEXT: br label [[LOOP_HEADER]]
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; CHECK: if:
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; CHECK-NEXT: [[C_2:%.*]] = icmp ne ptr [[B]], null
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; CHECK-NEXT: [[AND:%.*]] = and i1 [[C_2]], [[C_0]]
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; CHECK-NEXT: br i1 [[AND]], label [[THEN]], label [[EXIT]]
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; CHECK: then:
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; CHECK-NEXT: call void @clobber()
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; CHECK-NEXT: br label [[EXIT]]
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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 %loop.header
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loop.header:
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%node.1 = phi ptr [ %start, %entry ], [ null, %loop.latch ]
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%c.0 = icmp ne ptr %node.1, null
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br i1 %c.0, label %then, label %exit
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loop.latch: ; No predecessors!
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call void @clobber()
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br label %loop.header
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if:
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%c.2 = icmp ne ptr %b, null
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%and = and i1 %c.2, %c.0
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br i1 %and, label %then, label %exit
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then:
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call void @clobber()
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br label %exit
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exit:
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ret void
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}
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define void @test_cond_multi_use_with_one_use_simplified_before_adding_ne_fact(ptr %start, ptr %b) {
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; CHECK-LABEL: define void @test_cond_multi_use_with_one_use_simplified_before_adding_ne_fact
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; CHECK-SAME: (ptr [[START:%.*]], ptr [[B:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
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; CHECK: loop.header:
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; CHECK-NEXT: [[NODE_1:%.*]] = phi ptr [ [[START]], [[ENTRY:%.*]] ], [ null, [[LOOP_LATCH:%.*]] ]
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; CHECK-NEXT: [[C_0:%.*]] = icmp ne ptr [[NODE_1]], null
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; CHECK-NEXT: br i1 [[C_0]], label [[LOOP_LATCH]], label [[EXIT:%.*]]
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; CHECK: loop.latch:
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; CHECK-NEXT: [[C_1:%.*]] = call i1 @cond()
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; CHECK-NEXT: br i1 [[C_1]], label [[IF:%.*]], label [[LOOP_HEADER]]
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; CHECK: if:
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; CHECK-NEXT: [[C_2:%.*]] = icmp ne ptr [[B]], null
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; CHECK-NEXT: [[AND:%.*]] = and i1 [[C_2]], true
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; CHECK-NEXT: br i1 [[AND]], label [[THEN:%.*]], label [[EXIT]]
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; CHECK: then:
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; CHECK-NEXT: call void @clobber()
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; CHECK-NEXT: br label [[EXIT]]
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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 %loop.header
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loop.header:
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%node.1 = phi ptr [ %start, %entry ], [ null, %loop.latch ]
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%c.0 = icmp ne ptr %node.1, null
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br i1 %c.0, label %loop.latch, label %exit
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loop.latch:
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%c.1 = call i1 @cond()
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br i1 %c.1, label %if, label %loop.header
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if:
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%c.2 = icmp ne ptr %b, null
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%and = and i1 %c.2, %c.0
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br i1 %and, label %then, label %exit
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then:
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call void @clobber()
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br label %exit
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exit:
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ret void
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}
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