derek.holloway
7502bf64a4
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53 lines
1.6 KiB
LLVM
53 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes="lto<O2>" -S | FileCheck %s
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target datalayout = "i32:32:32-i64:64:64"
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target triple = "x86_64--"
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; Verify that the "late" simplifycfg options are set. This should get converted into a lookup table.
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define i32 @f(i32 %c) {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SWITCH_TABLEIDX:%.*]] = add i32 [[C:%.*]], -42
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; CHECK-NEXT: [[TMP0:%.*]] = icmp ult i32 [[SWITCH_TABLEIDX]], 7
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; CHECK-NEXT: br i1 [[TMP0]], label [[SWITCH_LOOKUP:%.*]], label [[RETURN:%.*]]
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; CHECK: switch.lookup:
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; CHECK-NEXT: [[TMP1:%.*]] = zext nneg i32 [[SWITCH_TABLEIDX]] to i64
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; CHECK-NEXT: [[SWITCH_GEP:%.*]] = getelementptr inbounds nuw [4 x i8], ptr @switch.table.f, i64 [[TMP1]]
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; CHECK-NEXT: [[SWITCH_LOAD:%.*]] = load i32, ptr [[SWITCH_GEP]], align 4
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; CHECK-NEXT: br label [[RETURN]]
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; CHECK: return:
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; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[SWITCH_LOAD]], [[SWITCH_LOOKUP]] ], [ 15, [[ENTRY:%.*]] ]
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; CHECK-NEXT: ret i32 [[R]]
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;
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entry:
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switch i32 %c, label %sw.default [
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i32 42, label %return
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i32 43, label %sw.bb1
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i32 44, label %sw.bb2
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i32 45, label %sw.bb3
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i32 46, label %sw.bb4
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i32 47, label %sw.bb5
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i32 48, label %sw.bb6
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]
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sw.bb1:
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br label %return
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sw.bb2:
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br label %return
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sw.bb3:
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br label %return
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sw.bb4:
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br label %return
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sw.bb5:
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br label %return
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sw.bb6:
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br label %return
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sw.default:
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br label %return
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return:
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%r = phi i32 [ 15, %sw.default ], [ 1, %sw.bb6 ], [ 62, %sw.bb5 ], [ 27, %sw.bb4 ], [ -1, %sw.bb3 ], [ 0, %sw.bb2 ], [ 123, %sw.bb1 ], [ 55, %entry ]
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ret i32 %r
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}
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