From 4401361a2fb92c82317dbfbb1616f54ced2b51f3 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Tue, 21 Oct 2008 03:38:42 +0000 Subject: Don't create TargetGlobalAddress nodes with offsets that don't fit in the 32-bit signed offset field of addresses. Even though this may be intended, some linkers refuse to relocate code where the relocated address computation overflows. Also, fix the sign-extension of constant offsets to use the actual pointer size, rather than the size of the GlobalAddress node, which may be different, for example on x86-64 where MVT::i32 is used when the address is being fit into the 32-bit displacement field. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57885 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/X86/x86-64-disp.ll | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 test/CodeGen/X86/x86-64-disp.ll (limited to 'test/CodeGen') diff --git a/test/CodeGen/X86/x86-64-disp.ll b/test/CodeGen/X86/x86-64-disp.ll new file mode 100644 index 0000000..4a8f6cd --- /dev/null +++ b/test/CodeGen/X86/x86-64-disp.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | llc -march=x86-64 | grep mov | count 2 + +; Fold an offset into an address even if it's not a 32-bit +; signed integer. + +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" +target triple = "x86_64-unknown-linux-gnu" +@call_used_regs = external global [53 x i8], align 32 + +define fastcc void @foo() nounwind { + %t = getelementptr [53 x i8]* @call_used_regs, i64 0, i64 4294967295 + store i8 1, i8* %t, align 1 + ret void +} -- cgit v1.1