| Bill Wendling | c6df988 | 2011-04-14 01:11:51 +0000 | [diff] [blame^] | 1 | ; RUN: llc < %s -march=x86-64 | FileCheck %s |
| Dan Gohman | af70e5c | 2009-08-26 14:59:13 +0000 | [diff] [blame] | 2 | |
| Bill Wendling | c6df988 | 2011-04-14 01:11:51 +0000 | [diff] [blame^] | 3 | ; Use movzbl (aliased as movzx) to avoid partial-register updates. |
| Dan Gohman | af70e5c | 2009-08-26 14:59:13 +0000 | [diff] [blame] | 4 | |
| 5 | define i32 @foo(i32 %p, i8 zeroext %x) nounwind { |
| Bill Wendling | c6df988 | 2011-04-14 01:11:51 +0000 | [diff] [blame^] | 6 | ; CHECK: movzx %dil, %eax |
| 7 | ; CHECK: movzx %al, %eax |
| Dan Gohman | af70e5c | 2009-08-26 14:59:13 +0000 | [diff] [blame] | 8 | %q = trunc i32 %p to i8 |
| 9 | %r = udiv i8 %q, %x |
| 10 | %s = zext i8 %r to i32 |
| 11 | %t = and i32 %s, 1 |
| 12 | ret i32 %t |
| 13 | } |
| 14 | define i32 @bar(i32 %p, i16 zeroext %x) nounwind { |
| 15 | %q = trunc i32 %p to i16 |
| 16 | %r = udiv i16 %q, %x |
| 17 | %s = zext i16 %r to i32 |
| 18 | %t = and i32 %s, 1 |
| 19 | ret i32 %t |
| 20 | } |