56 lines
1.9 KiB
LLVM
56 lines
1.9 KiB
LLVM
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; REQUIRES: asserts
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; RUN: opt < %s -S -debug-only=loop-unroll -loop-unroll -unroll-runtime -unroll-peel-multi-deopt-exit 2>&1 | FileCheck %s
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; RUN: opt < %s -S -debug-only=loop-unroll -unroll-peel-multi-deopt-exit -passes='require<profile-summary>,function(require<opt-remark-emit>,loop-unroll)' 2>&1 | FileCheck %s
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; Regression test for setting the correct idom for exit blocks.
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; CHECK: Loop Unroll: F[basic]
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; CHECK: PEELING loop %for.body with iteration count 2!
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define i32 @basic(i32* %p, i32 %k, i1 %c1, i1 %c2) #0 !prof !3 {
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entry:
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%cmp3 = icmp slt i32 0, %k
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br i1 %cmp3, label %for.body.lr.ph, label %for.end
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for.body.lr.ph: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.lr.ph, %for.body
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%i.05 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %latch ]
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%p.addr.04 = phi i32* [ %p, %for.body.lr.ph ], [ %incdec.ptr, %latch ]
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%incdec.ptr = getelementptr inbounds i32, i32* %p.addr.04, i32 1
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store i32 %i.05, i32* %p.addr.04, align 4
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%inc = add nsw i32 %i.05, 1
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%cmp = icmp slt i32 %inc, %k
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br i1 %c1, label %continue, label %to_side_exit
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continue:
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br i1 %c2, label %latch, label %side_exit, !prof !2
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latch:
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br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !prof !1
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for.cond.for.end_crit_edge: ; preds = %for.body
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br label %for.end
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to_side_exit:
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br i1 %c2, label %continue, label %side_exit, !prof !2
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for.end: ; preds = %for.cond.for.end_crit_edge, %entry
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%res = phi i32 [ 0, %entry ], [ %inc, %for.cond.for.end_crit_edge ]
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ret i32 %res
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side_exit:
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%rval = call i32(...) @llvm.experimental.deoptimize.i32() [ "deopt"(i32 %inc) ]
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ret i32 %rval
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}
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declare i32 @llvm.experimental.deoptimize.i32(...)
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attributes #0 = { nounwind }
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!1 = !{!"branch_weights", i32 1, i32 1}
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!2 = !{!"branch_weights", i32 1, i32 0}
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!3 = !{!"function_entry_count", i64 1}
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