f20488687e
This is a regression test for a miscompile that would have been introduced by an upcoming patch.
56 lines
1.7 KiB
LLVM
56 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S -passes=jump-threading,correlated-propagation < %s | FileCheck %s
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; This runs both jump threading and CVP to query values in the right order.
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; The comparison should not fold.
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define void @test(i32 %n, i1 %c, i1 %c2) {
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; CHECK-LABEL: define void @test(
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; CHECK-SAME: i32 [[N:%.*]], i1 [[C:%.*]], i1 [[C2:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ], [ 0, [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[IV]], 0
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; CHECK-NEXT: call void @use(i1 [[CMP]])
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; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
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; CHECK-NEXT: br label [[LOOP2:%.*]]
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; CHECK: loop2:
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; CHECK-NEXT: br i1 [[C]], label [[LOOP2_LATCH:%.*]], label [[LOOP2_LATCH]]
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; CHECK: loop2.latch:
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; CHECK-NEXT: br i1 [[C2]], label [[LOOP_LATCH]], label [[LOOP2]]
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; CHECK: loop.latch:
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; CHECK-NEXT: [[EXIT_COND:%.*]] = icmp eq i32 [[IV_NEXT]], [[N]]
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; CHECK-NEXT: br i1 [[EXIT_COND]], label [[EXIT:%.*]], label [[LOOP]]
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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
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loop:
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%iv = phi i32 [ %iv.next, %loop.latch ], [ 0, %entry ]
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%cmp = icmp eq i32 %iv, 0
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call void @use(i1 %cmp)
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%iv.next = add nuw nsw i32 %iv, 1
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br label %loop2
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loop2:
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br i1 %c, label %loop2.latch, label %loop2.split
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loop2.split:
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br label %loop2.latch
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loop2.latch:
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br i1 %c2, label %loop.latch, label %loop2
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loop.latch:
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%exit.cond = icmp eq i32 %iv.next, %n
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br i1 %exit.cond, label %exit, label %loop
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exit:
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ret void
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}
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declare void @use(i1)
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