| ; RUN: llc -stop-after expand-isel-pseudos <%s 2>&1 | FileCheck %s |
| |
| target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128" |
| target triple = "i386-unknown-linux-gnu" |
| |
| ; This test checks to make sure the lshr in %then1 block gets expanded using |
| ; GR16_ABCD pattern rather than GR32_ABCD pattern. By using the 16-bit pattern |
| ; this doesn't make the register liveness information look like the whole |
| ; 32-bit register is a live value, and allows generally better live register |
| ; analysis. |
| ; CHECK-LABEL: bb.1.then1: |
| ; CHECK-NOT: IMPLICIT_DEF |
| ; CHECK-NOT: INSERT_SUBREG |
| ; CHECK: sub_8bit_hi |
| ; CHECK-LABEL: bb.2.endif1: |
| |
| define i16 @foo4(i32 %prec, i8 *%dst, i16 *%src) { |
| entry: |
| %cnd = icmp ne i32 %prec, 0 |
| %t0 = load i16, i16 *%src, align 2 |
| br i1 %cnd, label %then1, label %endif1 |
| |
| then1: |
| %shr = lshr i16 %t0, 8 |
| %conv = trunc i16 %shr to i8 |
| store i8 %conv, i8 *%dst, align 1 |
| br label %endif1 |
| |
| endif1: |
| %t2 = phi i16 [0, %then1], [%t0, %entry] |
| ret i16 %t2 |
| } |
