From 27598ec1e255daea1e53c286e085b6044d897947 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 2 Jul 2009 03:14:25 +0000
Subject: [PATCH] Fix yet-another bug I introduced into fastisel, this time
 handling constant pool references that weren't getting properly rip-relative.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74689 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86FastISel.cpp          |  4 +++-
 test/CodeGen/X86/fast-isel-constpool.ll | 17 +++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 test/CodeGen/X86/fast-isel-constpool.ll

diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index bd994dea8f4..dcb8852a89b 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -1514,7 +1514,9 @@ unsigned X86FastISel::TargetMaterializeConstant(Constant *C) {
     } else if (Subtarget->isPICStyleGOT()) {
       OpFlag = X86II::MO_GOTOFF;
       PICBase = getInstrInfo()->getGlobalBaseReg(&MF);
-    }
+    } else if (Subtarget->isPICStyleRIPRel() &&
+               TM.getCodeModel() == CodeModel::Small)
+      PICBase = X86::RIP;
   }
 
   // Create the load from the constant pool.
diff --git a/test/CodeGen/X86/fast-isel-constpool.ll b/test/CodeGen/X86/fast-isel-constpool.ll
new file mode 100644
index 00000000000..ac2595a7461
--- /dev/null
+++ b/test/CodeGen/X86/fast-isel-constpool.ll
@@ -0,0 +1,17 @@
+; RUN: llvm-as < %s | llc -fast-isel | grep {LCPI1_0(%rip)}
+; Make sure fast isel uses rip-relative addressing when required.
+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-apple-darwin9.0"
+
+define i32 @f0(double %x) nounwind {
+entry:
+	%retval = alloca i32		; <i32*> [#uses=2]
+	%x.addr = alloca double		; <double*> [#uses=2]
+	store double %x, double* %x.addr
+	%tmp = load double* %x.addr		; <double> [#uses=1]
+	%cmp = fcmp olt double %tmp, 8.500000e-01		; <i1> [#uses=1]
+	%conv = zext i1 %cmp to i32		; <i32> [#uses=1]
+	store i32 %conv, i32* %retval
+	%0 = load i32* %retval		; <i32> [#uses=1]
+	ret i32 %0
+}