58 lines
2.7 KiB
LLVM
58 lines
2.7 KiB
LLVM
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; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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; CHECK-NOT: switch
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%llvm.dbg.anchor.type = type { i32, i32 }
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%llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8*, i1, i1, i8* }
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@llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata"
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@.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1]
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@.str1 = internal constant [6 x i8] c"/tmp/\00", section "llvm.metadata" ; <[6 x i8]*> [#uses=1]
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@.str2 = internal constant [55 x i8] c"4.2.1 (Based on Apple Inc. build 5636) (LLVM build 00)\00", section "llvm.metadata" ; <[55 x i8]*> [#uses=1]
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@llvm.dbg.compile_unit = internal constant %llvm.dbg.compile_unit.type { i32 458769, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.compile_units to { }*), i32 1, i8* getelementptr ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i8* getelementptr ([6 x i8], [6 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([55 x i8], [55 x i8]* @.str2, i32 0, i32 0), i1 true, i1 false, i8* null }, section "llvm.metadata" ; <%llvm.dbg.compile_unit.type*> [#uses=1]
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declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind
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; Test folding all to same dest
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define i32 @test3(i1 %C) {
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br i1 %C, label %Start, label %TheDest
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Start: ; preds = %0
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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switch i32 3, label %TheDest [
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i32 0, label %TheDest
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i32 1, label %TheDest
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i32 2, label %TheDest
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i32 5, label %TheDest
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]
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TheDest: ; preds = %Start, %Start, %Start, %Start, %Start, %0
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ret i32 1234
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}
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; Test folding switch -> branch
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define i32 @test4(i32 %C) {
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switch i32 %C, label %L1 [
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i32 0, label %L2
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]
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L1: ; preds = %0
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret i32 0
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L2: ; preds = %0
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret i32 1
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}
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; Can fold into a cond branch!
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define i32 @test5(i32 %C) {
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switch i32 %C, label %L1 [
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i32 0, label %L2
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i32 123, label %L1
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]
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L1: ; preds = %0, %0
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret i32 0
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L2: ; preds = %0
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call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*))
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ret i32 1
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}
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