33c265ddf7
Generate the GEP with the index type that InstCombine will cast it to but use the knowledge that the index is unsigned.
53 lines
1.7 KiB
LLVM
53 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -switch-to-lookup < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
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; RUN: opt -S -passes='simplifycfg<switch-to-lookup>' < %s -mtriple=x86_64-apple-darwin12.0.0 | FileCheck %s
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; rdar://17887153
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target datalayout = "e-p:64:64:64-S128-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f16:16:16-f32:32:32-f64:64:64-f128:128:128-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin12.0.0"
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define i64 @test(i3 %arg) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SWITCH_TABLEIDX:%.*]] = sub i3 [[ARG:%.*]], -4
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; CHECK-NEXT: [[TMP0:%.*]] = zext i3 [[SWITCH_TABLEIDX]] to i64
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; CHECK-NEXT: [[SWITCH_GEP:%.*]] = getelementptr inbounds [8 x i64], ptr @switch.table.test, i64 0, i64 [[TMP0]]
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; CHECK-NEXT: [[SWITCH_LOAD:%.*]] = load i64, ptr [[SWITCH_GEP]], align 8
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; CHECK-NEXT: [[V3:%.*]] = add i64 [[SWITCH_LOAD]], 0
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; CHECK-NEXT: ret i64 [[V3]]
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;
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entry:
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switch i3 %arg, label %Default [
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i3 -2, label %Label6
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i3 1, label %Label1
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i3 2, label %Label2
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i3 3, label %Label3
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i3 -4, label %Label4
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i3 -3, label %Label5
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]
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Default:
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%v1 = phi i64 [ 7, %Label6 ], [ 11, %Label5 ], [ 6, %Label4 ], [ 13, %Label3 ], [ 9, %Label2 ], [ 15, %Label1 ], [ 8, %entry ]
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%v2 = phi i64 [ 0, %Label6 ], [ 0, %Label5 ], [ 0, %Label4 ], [ 0, %Label3 ], [ 0, %Label2 ], [ 0, %Label1 ], [ 0, %entry ]
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%v3 = add i64 %v1, %v2
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ret i64 %v3
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Label1:
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br label %Default
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Label2:
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br label %Default
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Label3:
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br label %Default
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Label4:
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br label %Default
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Label5:
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br label %Default
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Label6:
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br label %Default
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}
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