derek.holloway
7502bf64a4
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100 lines
3.6 KiB
LLVM
100 lines
3.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86
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; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X64
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; This test makes sure that the compiler does not crash with an
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; assertion failure when trying to fold a vector shift left
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; by immediate count if the type of the input vector is different
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; to the result type.
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;
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; This happens for example when lowering a shift left of a MVT::v16i8 vector.
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; This is custom lowered into the following sequence:
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; count << 5
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; A = VSHLI(MVT::v8i16, r & (char16)15, 4)
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; B = BITCAST MVT::v16i8, A
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; VSELECT(r, B, count);
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; count += count
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; C = VSHLI(MVT::v8i16, r & (char16)63, 2)
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; D = BITCAST MVT::v16i8, C
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; r = VSELECT(r, C, count);
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; count += count
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; VSELECT(r, r+r, count);
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; count = count << 5;
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;
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; Where 'r' is a vector of type MVT::v16i8, and
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; 'count' is the vector shift count.
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define <16 x i8> @do_not_crash(ptr, ptr, ptr, i32, i64, i8) {
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; X86-LABEL: do_not_crash:
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; X86: # %bb.0: # %entry
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; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; X86-NEXT: movb %al, (%ecx)
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; X86-NEXT: movd %eax, %xmm1
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; X86-NEXT: psllq $56, %xmm1
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; X86-NEXT: pcmpeqd %xmm3, %xmm3
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; X86-NEXT: psllw $5, %xmm1
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; X86-NEXT: por {{\.?LCPI[0-9]+_[0-9]+}}, %xmm1
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; X86-NEXT: pxor %xmm2, %xmm2
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; X86-NEXT: pxor %xmm0, %xmm0
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; X86-NEXT: pcmpgtb %xmm1, %xmm0
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; X86-NEXT: pxor %xmm0, %xmm3
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; X86-NEXT: pand {{\.?LCPI[0-9]+_[0-9]+}}, %xmm0
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; X86-NEXT: por %xmm3, %xmm0
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; X86-NEXT: paddb %xmm1, %xmm1
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; X86-NEXT: pxor %xmm3, %xmm3
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; X86-NEXT: pcmpgtb %xmm1, %xmm3
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; X86-NEXT: movdqa %xmm3, %xmm4
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; X86-NEXT: pandn %xmm0, %xmm4
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; X86-NEXT: paddb %xmm0, %xmm0
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; X86-NEXT: paddb %xmm0, %xmm0
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; X86-NEXT: pand %xmm3, %xmm0
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; X86-NEXT: por %xmm4, %xmm0
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; X86-NEXT: paddb %xmm1, %xmm1
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; X86-NEXT: pcmpgtb %xmm1, %xmm2
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; X86-NEXT: movdqa %xmm2, %xmm1
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; X86-NEXT: pandn %xmm0, %xmm1
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; X86-NEXT: paddb %xmm0, %xmm0
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; X86-NEXT: pand %xmm2, %xmm0
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; X86-NEXT: por %xmm1, %xmm0
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; X86-NEXT: retl
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;
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; X64-LABEL: do_not_crash:
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; X64: # %bb.0: # %entry
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; X64-NEXT: movb %r9b, (%rdi)
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; X64-NEXT: movd %r9d, %xmm1
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; X64-NEXT: psllq $56, %xmm1
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; X64-NEXT: pcmpeqd %xmm2, %xmm2
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; X64-NEXT: psllw $5, %xmm1
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; X64-NEXT: por {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm1
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; X64-NEXT: pxor %xmm3, %xmm3
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; X64-NEXT: pxor %xmm0, %xmm0
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; X64-NEXT: pcmpgtb %xmm1, %xmm0
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; X64-NEXT: pxor %xmm0, %xmm2
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; X64-NEXT: pand {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0
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; X64-NEXT: por %xmm2, %xmm0
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; X64-NEXT: paddb %xmm1, %xmm1
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; X64-NEXT: pxor %xmm2, %xmm2
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; X64-NEXT: pcmpgtb %xmm1, %xmm2
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; X64-NEXT: movdqa %xmm2, %xmm4
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; X64-NEXT: pandn %xmm0, %xmm4
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; X64-NEXT: paddb %xmm0, %xmm0
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; X64-NEXT: paddb %xmm0, %xmm0
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; X64-NEXT: pand %xmm2, %xmm0
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; X64-NEXT: por %xmm4, %xmm0
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; X64-NEXT: paddb %xmm1, %xmm1
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; X64-NEXT: pcmpgtb %xmm1, %xmm3
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; X64-NEXT: movdqa %xmm3, %xmm1
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; X64-NEXT: pandn %xmm0, %xmm1
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; X64-NEXT: paddb %xmm0, %xmm0
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; X64-NEXT: pand %xmm3, %xmm0
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; X64-NEXT: por %xmm1, %xmm0
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; X64-NEXT: retq
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entry:
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store i8 %5, ptr %0
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%L5 = load i8, ptr %0
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%I8 = insertelement <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>, i8 %L5, i32 7
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%B51 = shl <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>, %I8
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ret <16 x i8> %B51
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}
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