[X86] Add test cases for PR42998. NFC

llvm-svn: 369862

llvm/test/CodeGen/X86/pr42998.ll

@@ -0,0 +1,73 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=skx | FileCheck %s --check-prefixes=CHECK,FAST-INCDEC
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=goldmont | FileCheck %s --check-prefixes=CHECK,SLOW-INCDEC
+
+define i64 @imm1_Oz(i32 %x, i32 %y) minsize nounwind {
+; CHECK-LABEL: imm1_Oz:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $edi killed $edi def $rdi
+; CHECK-NEXT:    pushq $1
+; CHECK-NEXT:    popq %rax
+; CHECK-NEXT:    leal (%rdi,%rax), %ecx
+; CHECK-NEXT:    addl %esi, %eax
+; CHECK-NEXT:    addq %rcx, %rax
+; CHECK-NEXT:    retq
+  %x1 = add i32 %x, 1
+  %y1 = add i32 %y, 1
+  %x1z = zext i32 %x1 to i64
+  %y1z = zext i32 %y1 to i64
+  %r = add i64 %x1z, %y1z
+  ret i64 %r
+}
+
+define i64 @imm1_Os(i32 %x, i32 %y) optsize nounwind {
+; FAST-INCDEC-LABEL: imm1_Os:
+; FAST-INCDEC:       # %bb.0:
+; FAST-INCDEC-NEXT:    # kill: def $edi killed $edi def $rdi
+; FAST-INCDEC-NEXT:    movl $1, %eax
+; FAST-INCDEC-NEXT:    leal (%rdi,%rax), %ecx
+; FAST-INCDEC-NEXT:    addl %esi, %eax
+; FAST-INCDEC-NEXT:    addq %rcx, %rax
+; FAST-INCDEC-NEXT:    retq
+;
+; SLOW-INCDEC-LABEL: imm1_Os:
+; SLOW-INCDEC:       # %bb.0:
+; SLOW-INCDEC-NEXT:    movl $1, %eax
+; SLOW-INCDEC-NEXT:    # kill: def $edi killed $edi def $rdi
+; SLOW-INCDEC-NEXT:    leal (%rdi,%rax), %ecx
+; SLOW-INCDEC-NEXT:    addl %esi, %eax
+; SLOW-INCDEC-NEXT:    addq %rcx, %rax
+; SLOW-INCDEC-NEXT:    retq
+  %x1 = add i32 %x, 1
+  %y1 = add i32 %y, 1
+  %x1z = zext i32 %x1 to i64
+  %y1z = zext i32 %y1 to i64
+  %r = add i64 %x1z, %y1z
+  ret i64 %r
+}
+
+define i64 @imm1_O2(i32 %x, i32 %y) nounwind {
+; FAST-INCDEC-LABEL: imm1_O2:
+; FAST-INCDEC:       # %bb.0:
+; FAST-INCDEC-NEXT:    # kill: def $esi killed $esi def $rsi
+; FAST-INCDEC-NEXT:    # kill: def $edi killed $edi def $rdi
+; FAST-INCDEC-NEXT:    leal 1(%rdi), %eax
+; FAST-INCDEC-NEXT:    incl %esi
+; FAST-INCDEC-NEXT:    addq %rsi, %rax
+; FAST-INCDEC-NEXT:    retq
+;
+; SLOW-INCDEC-LABEL: imm1_O2:
+; SLOW-INCDEC:       # %bb.0:
+; SLOW-INCDEC-NEXT:    # kill: def $esi killed $esi def $rsi
+; SLOW-INCDEC-NEXT:    # kill: def $edi killed $edi def $rdi
+; SLOW-INCDEC-NEXT:    leal 1(%rdi), %eax
+; SLOW-INCDEC-NEXT:    addl $1, %esi
+; SLOW-INCDEC-NEXT:    addq %rsi, %rax
+; SLOW-INCDEC-NEXT:    retq
+  %x1 = add i32 %x, 1
+  %y1 = add i32 %y, 1
+  %x1z = zext i32 %x1 to i64
+  %y1z = zext i32 %y1 to i64
+  %r = add i64 %x1z, %y1z
+  ret i64 %r
+}