Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/test/CodeGen/X86/bypass-slow-division-64.ll

@@ -0,0 +1,78 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; Check that 64-bit division is bypassed correctly.
+; RUN: llc < %s -mattr=+idivq-to-divl -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
+
+; Additional tests for 64-bit divide bypass
+
+define i64 @Test_get_quotient(i64 %a, i64 %b) nounwind {
+; CHECK-LABEL: Test_get_quotient:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    movq %rdi, %rax
+; CHECK-NEXT:    orq %rsi, %rax
+; CHECK-NEXT:    shrq $32, %rax
+; CHECK-NEXT:    je .LBB0_1
+; CHECK-NEXT:  # %bb.2:
+; CHECK-NEXT:    movq %rdi, %rax
+; CHECK-NEXT:    cqto
+; CHECK-NEXT:    idivq %rsi
+; CHECK-NEXT:    retq
+; CHECK-NEXT:  .LBB0_1:
+; CHECK-NEXT:    xorl %edx, %edx
+; CHECK-NEXT:    movl %edi, %eax
+; CHECK-NEXT:    divl %esi
+; CHECK-NEXT:    # kill: def %eax killed %eax def %rax
+; CHECK-NEXT:    retq
+  %result = sdiv i64 %a, %b
+  ret i64 %result
+}
+
+define i64 @Test_get_remainder(i64 %a, i64 %b) nounwind {
+; CHECK-LABEL: Test_get_remainder:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    movq %rdi, %rax
+; CHECK-NEXT:    orq %rsi, %rax
+; CHECK-NEXT:    shrq $32, %rax
+; CHECK-NEXT:    je .LBB1_1
+; CHECK-NEXT:  # %bb.2:
+; CHECK-NEXT:    movq %rdi, %rax
+; CHECK-NEXT:    cqto
+; CHECK-NEXT:    idivq %rsi
+; CHECK-NEXT:    movq %rdx, %rax
+; CHECK-NEXT:    retq
+; CHECK-NEXT:  .LBB1_1:
+; CHECK-NEXT:    xorl %edx, %edx
+; CHECK-NEXT:    movl %edi, %eax
+; CHECK-NEXT:    divl %esi
+; CHECK-NEXT:    # kill: def %edx killed %edx def %rdx
+; CHECK-NEXT:    movq %rdx, %rax
+; CHECK-NEXT:    retq
+  %result = srem i64 %a, %b
+  ret i64 %result
+}
+
+define i64 @Test_get_quotient_and_remainder(i64 %a, i64 %b) nounwind {
+; CHECK-LABEL: Test_get_quotient_and_remainder:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    movq %rdi, %rax
+; CHECK-NEXT:    orq %rsi, %rax
+; CHECK-NEXT:    shrq $32, %rax
+; CHECK-NEXT:    je .LBB2_1
+; CHECK-NEXT:  # %bb.2:
+; CHECK-NEXT:    movq %rdi, %rax
+; CHECK-NEXT:    cqto
+; CHECK-NEXT:    idivq %rsi
+; CHECK-NEXT:    addq %rdx, %rax
+; CHECK-NEXT:    retq
+; CHECK-NEXT:  .LBB2_1:
+; CHECK-NEXT:    xorl %edx, %edx
+; CHECK-NEXT:    movl %edi, %eax
+; CHECK-NEXT:    divl %esi
+; CHECK-NEXT:    # kill: def %edx killed %edx def %rdx
+; CHECK-NEXT:    # kill: def %eax killed %eax def %rax
+; CHECK-NEXT:    addq %rdx, %rax
+; CHECK-NEXT:    retq
+  %resultdiv = sdiv i64 %a, %b
+  %resultrem = srem i64 %a, %b
+  %result = add i64 %resultdiv, %resultrem
+  ret i64 %result
+}