dcf4b733ef
isSafeToExpand() for addrecs depends on whether the SCEVExpander will be used in CanonicalMode. At least one caller currently gets this wrong, resulting in PR50506. Fix this by a) making the CanonicalMode argument on the freestanding functions required and b) adding member functions on SCEVExpander that automatically take the SCEVExpander mode into account. We can use the latter variant nearly everywhere, and thus make sure that there is no chance of CanonicalMode mismatch. Fixes https://github.com/llvm/llvm-project/issues/50506. Differential Revision: https://reviews.llvm.org/D129630
44 lines
1.4 KiB
LLVM
44 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -indvars < %s | FileCheck %s
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; This test used to assert when expanding an addrec into a loop without
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; preheader.
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define void @test(ptr %tgt) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: bb31:
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; CHECK-NEXT: indirectbr ptr [[TGT:%.*]], [label [[EXIT:%.*]], label %bb33]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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; CHECK: bb33:
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; CHECK-NEXT: [[TMP34:%.*]] = phi i32 [ [[TMP50:%.*]], [[BB49:%.*]] ], [ 0, [[BB31:%.*]] ]
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; CHECK-NEXT: br i1 false, label [[BB40_PREHEADER:%.*]], label [[BB49]]
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; CHECK: bb40.preheader:
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; CHECK-NEXT: br label [[BB40:%.*]]
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; CHECK: bb40:
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; CHECK-NEXT: br label [[BB40]]
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; CHECK: bb49:
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; CHECK-NEXT: [[TMP50]] = add i32 [[TMP34]], 1
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; CHECK-NEXT: br label [[BB33:%.*]]
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;
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bb31:
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indirectbr ptr %tgt, [label %exit, label %bb33]
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exit:
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ret void
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bb33: ; preds = %bb49, %bb31
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%tmp34 = phi i32 [ %tmp50, %bb49 ], [ 0, %bb31 ]
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%tmp36 = add i32 %tmp34, 1
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br i1 false, label %bb40, label %bb49
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bb40: ; preds = %bb38, %bb37
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%tmp41 = phi i32 [ %tmp36, %bb33 ], [ %tmp39, %bb40 ]
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%tmp39 = add i32 %tmp41, 0
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br label %bb40
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bb49: ; preds = %bb35
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%tmp50 = add i32 %tmp34, 1
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br label %bb33
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}
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