62 lines
1.6 KiB
LLVM
62 lines
1.6 KiB
LLVM
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; RUN: opt %s --O0 -globalopt -S -o -
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; This is a regression test against very slow execution...
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; In bad case it should fail by timeout.
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; Hand-reduced from this example.
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; clang++ -mllvm -disable-llvm-optzns
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;#include <stdio.h>
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;
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;namespace {
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; char LargeBuffer[64 * 1024 * 1024];
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;}
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;
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;int main ( void ) {
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;
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; LargeBuffer[0] = 0;
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;
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; printf("");
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;
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; return LargeBuffer[0] == 0;
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;}
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; check that global array LargeBufferE was optimized out
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; and local variable LargeBufferE.0 was used instead.
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; CHECK-NOT: global
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; CHECK: main()
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; CHECK-NEXT: LargeBufferE.0
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; CHECK-NOT: global
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; ModuleID = 'test.cpp'
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source_filename = "test.cpp"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@LargeBufferE = internal global [67108864 x i8] zeroinitializer, align 16
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@.str = private unnamed_addr constant [1 x i8] c"\00", align 1
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; Function Attrs: norecurse uwtable
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define dso_local i32 @main() #0 {
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%1 = alloca i32, align 4
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store i32 0, i32* %1, align 4
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store i8 0, i8* getelementptr inbounds ([67108864 x i8], [67108864 x i8]* @LargeBufferE, i64 0, i64 0), align 16
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%2 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0))
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%3 = load i8, i8* getelementptr inbounds ([67108864 x i8], [67108864 x i8]* @LargeBufferE, i64 0, i64 0), align 16
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%4 = sext i8 %3 to i32
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%5 = icmp eq i32 %4, 0
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%6 = zext i1 %5 to i32
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ret i32 %6
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}
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declare dso_local i32 @printf(i8*, ...) #0
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attributes #0 = { norecurse uwtable }
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!llvm.module.flags = !{!0}
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!llvm.ident = !{!1}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{!"clang version 10.0.0 "}
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