e96925ce0b
It seems unnecessarily limiting to disallow recursive partial inlining, and there are clearly cases where it can benefit code by avoiding a function call and potentially enabling other transformations like dead argument elimination in cases where an argument is only used prior to the early-out test at the top of the function. The pass already properly rewrites the recursive calls within the body of the freshly cloned function, so the only change here is removing the bail-out when recursion is detected. Reviewed By: efriedma Differential Revision: https://reviews.llvm.org/D136383
32 lines
1.4 KiB
LLVM
32 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -partial-inliner -skip-partial-inlining-cost-analysis -S < %s | FileCheck %s
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define void @_Z26recursive_partial_inliningi(i32 noundef %i) local_unnamed_addr {
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; CHECK-LABEL: @_Z26recursive_partial_inliningi(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I:%.*]], 0
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; CHECK-NEXT: br i1 [[CMP]], label [[COMMON_RET2:%.*]], label [[IF_END:%.*]]
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; CHECK: common.ret2:
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; CHECK-NEXT: ret void
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; CHECK: if.end:
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; CHECK-NEXT: [[SUB:%.*]] = add nsw i32 [[I]], -1
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; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[SUB]], 0
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; CHECK-NEXT: br i1 [[CMP_I]], label [[_Z26RECURSIVE_PARTIAL_INLININGI_1_EXIT:%.*]], label [[CODEREPL_I:%.*]]
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; CHECK: codeRepl.i:
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; CHECK-NEXT: call void @_Z26recursive_partial_inliningi.1.if.end(i32 [[SUB]])
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; CHECK-NEXT: br label [[_Z26RECURSIVE_PARTIAL_INLININGI_1_EXIT]]
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; CHECK: _Z26recursive_partial_inliningi.1.exit:
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; CHECK-NEXT: br label [[COMMON_RET2]]
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;
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entry:
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%cmp = icmp slt i32 %i, 0
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br i1 %cmp, label %common.ret2, label %if.end
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common.ret2: ; preds = %entry, %if.end
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ret void
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if.end: ; preds = %entry
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%sub = add nsw i32 %i, -1
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tail call void @_Z26recursive_partial_inliningi(i32 noundef %sub)
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br label %common.ret2
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}
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