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is an immediate, in this check the value is negated and stored in and int64_t. The value can be -2^63 yet the result cannot be stored in an int64_t and this gives some undefined behaviour causing failures. The negation is only necessary when the values is within a certain range and so it should not need to negate -2^63, this patch introduces this and also a regression test. Differential Revision: http://reviews.llvm.org/D11408 llvm-svn: 243100
14 lines
486 B
LLVM
14 lines
486 B
LLVM
; RUN: llc < %s -mtriple=arm-none-eabi -mcpu=cortex-a8 2>&1 | FileCheck %s
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; RUN: llc < %s -mtriple=thumb-none-eabi -mcpu=cortex-a8 2>&1 | FileCheck %s
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define <1 x i64> @vshl_minint() #0 {
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entry:
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; CHECK-LABEL: vshl_minint
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; CHECK: vldr
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; CHECK: vshl.u64
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%vshl.i = tail call <1 x i64> @llvm.arm.neon.vshiftu.v1i64(<1 x i64> undef, <1 x i64> <i64 -9223372036854775808>)
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ret <1 x i64> %vshl.i
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}
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declare <1 x i64> @llvm.arm.neon.vshiftu.v1i64(<1 x i64>, <1 x i64>)
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