[llvm-branch-commits] [llvm] d079fec - [X86] Fix lowering TLS under darwin large code model (#80907)

[Tom Stellard via llvm-branch-commits]

Author: Arthur Eubanks
Date: 2024-02-09T13:28:23-08:00
New Revision: d079fec440081f3e8e0a79dbbde2066cca077f77

URL: https://github.com/llvm/llvm-project/commit/d079fec440081f3e8e0a79dbbde2066cca077f77
DIFF: https://github.com/llvm/llvm-project/commit/d079fec440081f3e8e0a79dbbde2066cca077f77.diff

LOG: [X86] Fix lowering TLS under darwin large code model (#80907)

OpFlag and WrapperKind should be chosen consistently with each other in
regards to PIC, otherwise we hit asserts later on.

Broken by c04a05d8.

Fixes #80831.

(cherry picked from commit 5a83bccb35d6b0e6914b52af6db067aa01dd3efb)

Added: 
    

Modified: 
    llvm/lib/Target/X86/X86ISelLowering.cpp
    llvm/test/CodeGen/X86/tls-models.ll

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index e158312caffdec..a071c5a3ca0326 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -18703,16 +18703,18 @@ X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
   if (Subtarget.isTargetDarwin()) {
     // Darwin only has one model of TLS.  Lower to that.
     unsigned char OpFlag = 0;
-    unsigned WrapperKind = Subtarget.isPICStyleRIPRel() ?
-                           X86ISD::WrapperRIP : X86ISD::Wrapper;
+    unsigned WrapperKind = 0;
 
     // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
     // global base reg.
     bool PIC32 = PositionIndependent && !Subtarget.is64Bit();
-    if (PIC32)
+    if (PIC32) {
       OpFlag = X86II::MO_TLVP_PIC_BASE;
-    else
+      WrapperKind = X86ISD::Wrapper;
+    } else {
       OpFlag = X86II::MO_TLVP;
+      WrapperKind = X86ISD::WrapperRIP;
+    }
     SDLoc DL(Op);
     SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
                                                 GA->getValueType(0),

diff  --git a/llvm/test/CodeGen/X86/tls-models.ll b/llvm/test/CodeGen/X86/tls-models.ll
index fc8e302338d960..8de9de15a5f06e 100644
--- a/llvm/test/CodeGen/X86/tls-models.ll
+++ b/llvm/test/CodeGen/X86/tls-models.ll
@@ -5,6 +5,7 @@
 
 ; Darwin always uses the same model.
 ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck -check-prefix=DARWIN %s
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -code-model=large | FileCheck -check-prefix=DARWIN %s
 
 @external_gd = external thread_local global i32
 @internal_gd = internal thread_local global i32 42