2fba4694d0
Fixes #56882. Fixes #60254. When switch has only one successor, it make no sense to thread it. And computing the cost of it brings div-by-zero exception. We prevent it in this patch.
44 lines
1.4 KiB
LLVM
44 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
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; RUN: opt -S -passes=dfa-jump-threading %s | FileCheck %s
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define void @pr60254() {
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; CHECK-LABEL: define void @pr60254() {
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; CHECK-NEXT: entry_1:
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; CHECK-NEXT: br label [[BB_2:%.*]]
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; CHECK: bb_2:
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; CHECK-NEXT: [[PTR_I32_25_0:%.*]] = phi i32 [ 0, [[BB_4:%.*]] ], [ 0, [[BB_2]] ], [ 0, [[ENTRY_1:%.*]] ]
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; CHECK-NEXT: switch i32 [[PTR_I32_25_0]], label [[BB_2]] [
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; CHECK-NEXT: ]
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; CHECK: bb_4:
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; CHECK-NEXT: br label [[BB_2]]
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;
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entry_1:
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br label %bb_2
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bb_2: ; preds = %bb_4, %bb_2, %entry_1
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%ptr_i32_25.0 = phi i32 [ 0, %bb_4 ], [ 0, %bb_2 ], [ 0, %entry_1 ]
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switch i32 %ptr_i32_25.0, label %bb_2 [
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]
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bb_4: ; No predecessors!
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br label %bb_2
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}
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define void @pr56882() {
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; CHECK-LABEL: define void @pr56882() {
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; CHECK-NEXT: entry_1:
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; CHECK-NEXT: br label [[BB_2:%.*]]
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; CHECK: bb_2:
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; CHECK-NEXT: [[PTR_I64_16_0:%.*]] = phi i64 [ -1317805584074026212, [[ENTRY_1:%.*]] ], [ -158622699357888703, [[BB_2]] ]
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; CHECK-NEXT: switch i64 [[PTR_I64_16_0]], label [[BB_2]] [
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; CHECK-NEXT: ]
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;
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entry_1:
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br label %bb_2
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bb_2: ; preds = %bb_2, %entry_1
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%ptr_i64_16.0 = phi i64 [ -1317805584074026212, %entry_1 ], [ -158622699357888703, %bb_2 ]
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switch i64 %ptr_i64_16.0, label %bb_2 [
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]
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}
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