[X86] Add reduced test case for PR49162

Author: RKSimon

llvm/test/CodeGen/X86/pr49162.ll

@@ -0,0 +1,29 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s --check-prefix=X86
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=X64
+
+define i32* @PR49162(i32* %base, i160* %ptr160) {
+; X86-LABEL: PR49162:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl 8(%eax), %ecx
+; X86-NEXT:    shll $16, %ecx
+; X86-NEXT:    movl %ecx, %eax
+; X86-NEXT:    sarl $31, %eax
+; X86-NEXT:    shldl $16, %ecx, %eax
+; X86-NEXT:    shll $2, %eax
+; X86-NEXT:    addl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: PR49162:
+; X64:       # %bb.0:
+; X64-NEXT:    leaq -4(%rdi), %rax
+; X64-NEXT:    retq
+  %load160 = load i160, i160* %ptr160, align 4
+  %shl = shl i160 %load160, 80
+  %ashr160 = ashr i160 %shl, 112
+  %trunc = trunc i160 %ashr160 to i64
+  %ashr64 = ashr i64 %trunc, 32
+  %gep = getelementptr inbounds i32, i32* %base, i64 %ashr64
+  ret i32* %gep
+}