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a564159d85
On x86_86 the lea instruction can only use a 32 bit immediate value. When the code is compiled statically the RIP register is not used, meaning the immediate is all that can be used for the relocation, which is not sufficient in the case of targets more than +/- 2GB away. This patch bails out of fast isel in those cases and reverts to DAG which does the right thing. Test case included. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211040 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
819 B
LLVM
25 lines
819 B
LLVM
; RUN: llc -mtriple=x86_64-pc-win32-macho -relocation-model=static -O0 < %s | FileCheck %s
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; Ensure that we don't generate a movl and not a lea for a static relocation
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; when compiling for 64 bit.
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%struct.MatchInfo = type [64 x i64]
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@NO_MATCH = internal constant %struct.MatchInfo zeroinitializer, align 8
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define void @setup() {
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%pending = alloca %struct.MatchInfo, align 8
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%t = bitcast %struct.MatchInfo* %pending to i8*
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %t, i8* bitcast (%struct.MatchInfo* @NO_MATCH to i8*), i64 512, i32 8, i1 false)
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%u = getelementptr inbounds %struct.MatchInfo* %pending, i32 0, i32 2
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%v = load i64* %u, align 8
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br label %done
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done:
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ret void
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; CHECK: movl $_NO_MATCH, {{.*}}
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}
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; Function Attrs: nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i32, i1)
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