Changes in directory llvm/lib/Target/X86:
README-X86-64.txt updated: 1.1 -> 1.2
---
Log message:
Update
---
Diffs of the changes: (+10 -0)
README-X86-64.txt | 10 ++++++++++
1 files changed, 10 insertions(+)
Index: llvm/lib/Target/X86/README-X86-64.txt
diff -u llvm/lib/Target/X86/README-X86-64.txt:1.1
llvm/lib/Target/X86/README-X86-64.txt:1.2
--- llvm/lib/Target/X86/README-X86-64.txt:1.1 Fri Sep 8 01:48:29 2006
+++ llvm/lib/Target/X86/README-X86-64.txt Mon Dec 4 21:58:23 2006
@@ -252,6 +252,16 @@
possible. The above is actually one byte shorter than
movq $_dst, _ptr
+A better example is the code from PR1018. We are generating:
+ leaq xcalloc2(%rip), %rax
+ movq %rax, 8(%rsp)
+when we should be generating:
+ movq $xcalloc2, 8(%rsp)
+
+The reason the better codegen isn't done now is support for static small
+code model in JIT mode. The JIT cannot ensure that all GV's are placed in the
+lower 4G so we are not treating GV labels as 32-bit values.
+
//===---------------------------------------------------------------------===//
Right now the asm printer assumes GlobalAddress are accessed via RIP relative
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