caa32e6d6f
Comments attached to the `ScaledReg` field of `struct Formula` explains that, `ScaledReg` must be non-null when `Scale` is non-zero. This fixes up a code path where this invariant is violated. Also, add an assert to ensure this invariant holds true. Without this patch, compiler aborts with the attached test case. Fixes #76504
31 lines
899 B
LLVM
31 lines
899 B
LLVM
; Reduced from https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65323 by @RKSimon
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;
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; RUN: opt -S -passes=loop-reduce %s | FileCheck %s
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;
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; Make sure we don't trigger an assertion.
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@G = external global i32
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define void @foo() {
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; CHECK-LABEL: foo
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bb8:
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br label %bb30
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bb30: ; preds = %bb30, %bb8
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%l0 = phi i64 [ -2222, %bb8 ], [ %r23, %bb30 ]
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%A22 = alloca i16, align 2
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%r23 = add nuw i64 1, %l0
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%G7 = getelementptr i16, ptr %A22, i64 %r23
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%B15 = urem i64 %r23, %r23
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%G6 = getelementptr i16, ptr %G7, i64 %B15
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%B1 = urem i64 %r23, %r23
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%B8 = sub i64 -1, %r23
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%B18 = sub i64 %B8, %B1
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%G5 = getelementptr i16, ptr %G6, i64 %B18
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store ptr %G5, ptr undef, align 8
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br label %bb30
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}
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