[LLVMbugs] [Bug 3391] New: llvm-gcc -m32 exponential memory use / llc segfault

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=3391

           Summary: llvm-gcc -m32 exponential memory use / llc segfault
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: edwintorok at gmail.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=2440)
 --> (http://llvm.org/bugs/attachment.cgi?id=2440)
testcase-min.i

$ (ulimit -v 1024768; llvm-gcc -m32 testcase-min.i -O1)
testcase-min.i:50: warning: excess elements in struct initializer
testcase-min.i:50: warning: (near initialization for ‘pci_indirect’)
testcase-min.i:50: warning: excess elements in struct initializer
testcase-min.i:50: warning: (near initialization for ‘pci_indirect’)
llvm-gcc: Internal error: Segmentation fault (program cc1)
Please submit a full bug report.
See <URL:http://developer.apple.com/bugreporter> for instructions

Without ulimit it fills entire mem.

Bugpoint reduced testcase below, preprocessed C attached:
; ModuleID = 'bugpoint-reduced-simplified.bc'
target datalayout =
"e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
target triple = "i386-unknown-linux-gnu"
@pci_indirect = external global { }             ; <{ }*> [#uses=1]
@pcibios_last_bus = external global i32         ; <i32*> [#uses=2]

define void @pci_pcbios_init() nounwind section ".init.text" {
entry:
        br label %bb1.i

bb1.i:          ; preds = %bb6.i.i, %bb1.i, %entry
        %0 = load i32* null, align 8            ; <i32> [#uses=1]
        %1 = icmp ugt i32 %0, 1048575           ; <i1> [#uses=1]
        br i1 %1, label %bb2.i, label %bb1.i

bb2.i:          ; preds = %bb1.i
        %asmtmp.i.i = tail call { i32, i32, i32, i32 } asm "lcall *(%edi);
cld\0A\09jc 1f\0A\09xor %ah, %ah\0A1:",
"={dx},={ax},={bx},={cx},1,{di},~{dirflag},~{fpsr},~{flags},~{memory}"(i32
45313, { }* @pci_indirect) nounwind             ; <{ i32, i32, i32, i32 }>
[#uses=2]
        %asmresult2.i.i = extractvalue { i32, i32, i32, i32 } %asmtmp.i.i, 1   
        ; <i32> [#uses=1]
        %2 = lshr i32 %asmresult2.i.i, 8                ; <i32> [#uses=1]
        %3 = trunc i32 %2 to i8         ; <i8> [#uses=1]
        %4 = load i32* @pcibios_last_bus, align 4               ; <i32>
[#uses=1]
        %5 = icmp slt i32 %4, 0         ; <i1> [#uses=1]
        br i1 %5, label %bb5.i.i, label %bb6.i.i

bb5.i.i:                ; preds = %bb2.i
        %asmresult4.i.i = extractvalue { i32, i32, i32, i32 } %asmtmp.i.i, 3   
        ; <i32> [#uses=1]
        %6 = and i32 %asmresult4.i.i, 255               ; <i32> [#uses=1]
        store i32 %6, i32* @pcibios_last_bus, align 4
        br label %bb6.i.i

bb6.i.i:                ; preds = %bb5.i.i, %bb2.i
        %7 = icmp eq i8 %3, 0           ; <i1> [#uses=1]
        %or.cond.i.i = and i1 %7, false         ; <i1> [#uses=1]
        br i1 %or.cond.i.i, label %bb1.i, label %bb8.i.i

bb8.i.i:                ; preds = %bb6.i.i
        unreachable
}


-- 
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.