Bug 8621 fix - pointer cast stripped from inline asm constraint argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119590 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 4c63588dbcfb2f2761607b1a34e9761ca43caf4f..a471aab0e5185c515b3c98a14b775881101ba6ca 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -5545,9 +5545,6 @@ void SelectionDAGBuilder::visitInlineAsm(ImmutableCallSite CS) {
     // If this is an input or an indirect output, process the call argument.
     // BasicBlocks are labels, currently appearing only in asm's.
     if (OpInfo.CallOperandVal) {
-      // Strip bitcasts, if any.  This mostly comes up for functions.
-      OpInfo.CallOperandVal = OpInfo.CallOperandVal->stripPointerCasts();
-
       if (const BasicBlock *BB = dyn_cast<BasicBlock>(OpInfo.CallOperandVal)) {
         OpInfo.CallOperand = DAG.getBasicBlock(FuncInfo.MBBMap[BB]);
       } else {

diff --git a/test/CodeGen/X86/inline-asm-ptr-cast.ll b/test/CodeGen/X86/inline-asm-ptr-cast.ll
new file mode 100644 (file)
index 0000000..e56b404
--- /dev/null
+++ b/test/CodeGen/X86/inline-asm-ptr-cast.ll
@@ -0,0 +1,27 @@
+; RUN: llc -mtriple=x86_64-unknown-linux-gnu %s
+; ModuleID = 'bug.c'
+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-n8:16:32:64"
+target triple = "x86_64-unknown-linux-gnu"
+
+@func.flagmask = internal constant i64 1, align 8
+
+define void @func() nounwind {
+entry:
+  %src = alloca i32, align 4
+  %dst = alloca i32, align 4
+  %flags = alloca i64, align 8
+  %newflags = alloca i64, align 8
+  store i32 0, i32* %src, align 4
+  store i32 0, i32* %dst, align 4
+  store i64 1, i64* %flags, align 8
+  store i64 -1, i64* %newflags, align 8
+  %0 = bitcast i32* %dst to i8*
+  %tmp = load i64* %flags, align 8
+  %and = and i64 %tmp, 1
+  %1 = bitcast i32* %src to i8*
+  %tmp1 = load i8* %1
+  %2 = bitcast i32* %dst to i8*
+  %tmp2 = load i8* %2
+  call void asm "pushfq \0Aandq $2, (%rsp) \0Aorq  $3, (%rsp) \0Apopfq \0Aaddb $4, $1 \0Apushfq \0Apopq $0 \0A", "=*&rm,=*&rm,i,r,r,1,~{cc},~{dirflag},~{fpsr},~{flags}"(i64* %newflags, i8* %0, i64 -2, i64 %and, i8 %tmp1, i8 %tmp2) nounwind
+  ret void
+}