diff --git a/test/CodeGen/X86/overflow.ll b/test/CodeGen/X86/overflow.ll new file mode 100644 index 00000000000..7e67b9df469 --- /dev/null +++ b/test/CodeGen/X86/overflow.ll @@ -0,0 +1,55 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+avx | FileCheck %s --check-prefix=X32 +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s --check-prefix=X64 + +define i1 @mulhioverflow(i64 %a, i64 %b, i64 %c) nounwind { +; X32-LABEL: mulhioverflow: +; X32: # BB#0: +; X32-NEXT: pushl %ebp +; X32-NEXT: movl %esp, %ebp +; X32-NEXT: pushl %esi +; X32-NEXT: andl $-8, %esp +; X32-NEXT: subl $24, %esp +; X32-NEXT: movl 24(%ebp), %esi +; X32-NEXT: movl %esp, %eax +; X32-NEXT: pushl $0 +; X32-NEXT: pushl $0 +; X32-NEXT: pushl 20(%ebp) +; X32-NEXT: pushl 16(%ebp) +; X32-NEXT: pushl $0 +; X32-NEXT: pushl $0 +; X32-NEXT: pushl 12(%ebp) +; X32-NEXT: pushl 8(%ebp) +; X32-NEXT: pushl %eax +; X32-NEXT: calll __multi3 +; X32-NEXT: addl $32, %esp +; X32-NEXT: movl {{[0-9]+}}(%esp), %eax +; X32-NEXT: andl $1, %esi +; X32-NEXT: addl {{[0-9]+}}(%esp), %esi +; X32-NEXT: adcl $0, %eax +; X32-NEXT: setb %al +; X32-NEXT: leal -4(%ebp), %esp +; X32-NEXT: popl %esi +; X32-NEXT: popl %ebp +; X32-NEXT: retl +; +; X64-LABEL: mulhioverflow: +; X64: # BB#0: +; X64-NEXT: movq %rdx, %rcx +; X64-NEXT: movq %rdi, %rax +; X64-NEXT: mulq %rsi +; X64-NEXT: andl $1, %ecx +; X64-NEXT: addq %rdx, %rcx +; X64-NEXT: setb %al +; X64-NEXT: retq + %1 = zext i64 %a to i128 + %2 = zext i64 %b to i128 + %3 = mul i128 %1, %2 + %4 = lshr i128 %3, 64 + %5 = and i64 %c, 1 + %6 = zext i64 %5 to i128 + %7 = add i128 %4, %6 + %8 = lshr i128 %7, 64 + %9 = trunc i128 %8 to i1 + ret i1 %9 +}