derek.holloway
7502bf64a4
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51 lines
1.9 KiB
LLVM
51 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
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; Make sure codegen doesn't try to inspect the use list of constants
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; Make sure we do not try to make use of the uselist of a constant
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; null when looking for the alignment of the pointer.
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define <2 x i32> @no_uselist_null_isDereferenceableAndAlignedPointer(i1 %arg0, ptr align(4) %arg) {
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; CHECK-LABEL: no_uselist_null_isDereferenceableAndAlignedPointer:
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; CHECK: # %bb.0:
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: testb $1, %dil
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; CHECK-NEXT: cmoveq %rsi, %rax
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; CHECK-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
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; CHECK-NEXT: retq
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%select.ptr = select i1 %arg0, ptr null, ptr %arg
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%load = load i32, ptr %select.ptr
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%insert = insertelement <2 x i32> zeroinitializer, i32 %load, i64 0
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ret <2 x i32> %insert
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}
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; Make sure we do not try to inspect the uselist of a constant null
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; when processing a memcpy
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define void @gep_nullptr_no_inspect_uselist(ptr %arg) {
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; CHECK-LABEL: gep_nullptr_no_inspect_uselist:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movzbl 16, %eax
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; CHECK-NEXT: movb %al, (%rdi)
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; CHECK-NEXT: retq
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%null_gep = getelementptr i8, ptr null, i64 16
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call void @llvm.memcpy.p0.p0.i64(ptr %arg, ptr %null_gep, i64 1, i1 false)
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ret void
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}
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define <16 x i8> @load_null_offset() {
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; CHECK-LABEL: load_null_offset:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movzbl 11, %eax
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; CHECK-NEXT: movd %eax, %xmm0
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; CHECK-NEXT: pslld $8, %xmm0
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; CHECK-NEXT: retq
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%gep.null = getelementptr i8, ptr null, i64 11
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%load = load i8, ptr %gep.null, align 1
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%insert = insertelement <16 x i8> zeroinitializer, i8 %load, i64 1
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ret <16 x i8> %insert
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}
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declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #0
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attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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