; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py ; RUN: llc < %s -mtriple=x86_64-linux -mcpu=core2 -verify-machineinstrs | FileCheck %s ; We were miscompiling this and using %ax instead of %cx in the movw ; in the following sequence: ; movswl %cx, %ecx ; movw %cx, (%rsi) ; movslq %ecx, %rcx ; ; We can't produce the above sequence without special SD-level ; heuristics. Now we produce this: define i32 @f(i1 %foo, i16* %tm_year2, i8* %bar, i16 %zed, i32 %zed2) { ; CHECK-LABEL: f: ; CHECK: # %bb.0: # %entry ; CHECK-NEXT: movl $-1, %eax ; CHECK-NEXT: testb $1, %dil ; CHECK-NEXT: jne .LBB0_2 ; CHECK-NEXT: # %bb.1: # %if.end ; CHECK-NEXT: movslq %r8d, %rax ; CHECK-NEXT: imulq $1374389535, %rax, %rcx # imm = 0x51EB851F ; CHECK-NEXT: movq %rcx, %rdi ; CHECK-NEXT: shrq $63, %rdi ; CHECK-NEXT: sarq $37, %rcx ; CHECK-NEXT: addl %edi, %ecx ; CHECK-NEXT: imull $100, %ecx, %ecx ; CHECK-NEXT: subl %ecx, %eax ; CHECK-NEXT: movw %ax, (%rsi) ; CHECK-NEXT: cwtl ; CHECK-NEXT: cltq ; CHECK-NEXT: imulq $1717986919, %rax, %rax # imm = 0x66666667 ; CHECK-NEXT: movq %rax, %rcx ; CHECK-NEXT: shrq $63, %rcx ; CHECK-NEXT: shrq $34, %rax ; CHECK-NEXT: addl %ecx, %eax ; CHECK-NEXT: movb %al, (%rdx) ; CHECK-NEXT: xorl %eax, %eax ; CHECK-NEXT: .LBB0_2: # %return ; CHECK-NEXT: retq entry: br i1 %foo, label %return, label %if.end if.end: %rem = srem i32 %zed2, 100 %conv3 = trunc i32 %rem to i16 store i16 %conv3, i16* %tm_year2 %sext = shl i32 %rem, 16 %conv5 = ashr exact i32 %sext, 16 %div = sdiv i32 %conv5, 10 %conv6 = trunc i32 %div to i8 store i8 %conv6, i8* %bar br label %return return: %retval.0 = phi i32 [ 0, %if.end ], [ -1, %entry ] ret i32 %retval.0 }