derek.holloway
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56 lines
1.9 KiB
LLVM
56 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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declare void @fn()
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define i1 @test_pr54228(i32 %a, i32 %b, i1 %i.0, i1 %i.1) {
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; CHECK-LABEL: @test_pr54228(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[I_0:%.*]], label [[PH_1:%.*]], label [[LOOP_HEADER:%.*]]
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; CHECK: ph.1:
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; CHECK-NEXT: [[C_1:%.*]] = icmp eq i32 [[A:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[C_1]])
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; CHECK-NEXT: br label [[LOOP_HEADER]]
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; CHECK: loop.header:
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; CHECK-NEXT: br i1 [[I_1:%.*]], label [[LOOP_THEN:%.*]], label [[LOOP_LATCH:%.*]]
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; CHECK: loop.then:
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; CHECK-NEXT: call void @fn()
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; CHECK-NEXT: [[C_2:%.*]] = icmp eq i32 [[B:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[C_2]])
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; CHECK-NEXT: br label [[LOOP_LATCH]]
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; CHECK: loop.latch:
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; CHECK-NEXT: [[C_3:%.*]] = icmp eq i32 [[B]], 1
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; CHECK-NEXT: br i1 [[C_3]], label [[EXIT:%.*]], label [[LOOP_HEADER]]
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; CHECK: exit:
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; CHECK-NEXT: [[C_4:%.*]] = icmp eq i32 [[A]], 0
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; CHECK-NEXT: ret i1 [[C_4]]
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;
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entry:
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br i1 %i.0, label %ph.1, label %loop.header
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ph.1: ; preds = %entry
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%c.1 = icmp eq i32 %a, 0
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call void @llvm.assume(i1 %c.1)
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br label %loop.header
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loop.header: ; preds = %loop.latch, %ph.1, %entry
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br i1 %i.1, label %loop.then, label %loop.latch
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loop.then: ; preds = %loop.header
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call void @fn()
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%c.2 = icmp eq i32 %b, 0
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call void @llvm.assume(i1 %c.2)
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br label %loop.latch
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loop.latch: ; preds = %loop.then, %loop.header
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%c.3 = icmp eq i32 %b, 1
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br i1 %c.3, label %exit, label %loop.header
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exit: ; preds = %loop.latch
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%c.4 = icmp eq i32 %a, 0
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ret i1 %c.4
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}
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declare void @llvm.assume(i1 noundef)
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