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19b31c24cb
Memory references were not being propagated for this folded load. This prevented optimizations like LICM from hoisting the load. Added test to verify that this allows LICM to proceed. llvm-svn: 273617
64 lines
2.7 KiB
LLVM
64 lines
2.7 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc -mcpu=haswell < %s -stats -O2 2>&1 | grep "4 machine-licm.*hoisted"
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; For test:
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; 2 invariant loads, 1 for OBJC_SELECTOR_REFERENCES_
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; and 1 for objc_msgSend from the GOT
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; For test_multi_def:
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; 2 invariant load (full multiply, both loads should be hoisted.)
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.7.2"
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@"\01L_OBJC_METH_VAR_NAME_" = internal global [4 x i8] c"foo\00", section "__TEXT,__objc_methname,cstring_literals", align 1
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@"\01L_OBJC_SELECTOR_REFERENCES_" = internal global i8* getelementptr inbounds ([4 x i8], [4 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i64 0, i64 0), section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip"
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@"\01L_OBJC_IMAGE_INFO" = internal constant [2 x i32] [i32 0, i32 16], section "__DATA, __objc_imageinfo, regular, no_dead_strip"
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@llvm.used = appending global [3 x i8*] [i8* getelementptr inbounds ([4 x i8], [4 x i8]* @"\01L_OBJC_METH_VAR_NAME_", i32 0, i32 0), i8* bitcast (i8** @"\01L_OBJC_SELECTOR_REFERENCES_" to i8*), i8* bitcast ([2 x i32]* @"\01L_OBJC_IMAGE_INFO" to i8*)], section "llvm.metadata"
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define void @test(i8* %x) uwtable ssp {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%0 = load i8*, i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8, !invariant.load !0
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%call = tail call i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8* (i8*, i8*)*)(i8* %x, i8* %0)
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%inc = add i32 %i.01, 1
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%exitcond = icmp eq i32 %inc, 10000
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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declare i8* @objc_msgSend(i8*, i8*, ...) nonlazybind
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define void @test_multi_def(i64* dereferenceable(8) %x1,
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i64* dereferenceable(8) %x2,
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i128* %y, i64 %count) nounwind {
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entry:
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br label %for.body
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for.check:
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%inc = add nsw i64 %i, 1
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%done = icmp sge i64 %inc, %count
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br i1 %done, label %exit, label %for.body
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for.body:
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%i = phi i64 [ 0, %entry ], [ %inc, %for.check ]
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%x1_load = load i64, i64* %x1, align 8, !invariant.load !0
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%x1_zext = zext i64 %x1_load to i128
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%x2_load = load i64, i64* %x2, align 8, !invariant.load !0
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%x2_zext = zext i64 %x2_load to i128
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%x_prod = mul i128 %x1_zext, %x2_zext
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%y_elem = getelementptr inbounds i128, i128* %y, i64 %i
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%y_load = load i128, i128* %y_elem, align 8
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%y_plus = add i128 %x_prod, %y_load
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store i128 %y_plus, i128* %y_elem, align 8
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br label %for.check
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exit:
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ret void
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}
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!0 = !{}
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