1 ; RUN: llc -stop-after expand-isel-pseudos <%s 2>&1 | FileCheck %s 2 3 target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128" 4 target triple = "i386-unknown-linux-gnu" 5 6 ; This test checks to make sure the lshr in %then1 block gets expanded using 7 ; GR16_ABCD pattern rather than GR32_ABCD pattern. By using the 16-bit pattern 8 ; this doesn't make the register liveness information look like the whole 9 ; 32-bit register is a live value, and allows generally better live register 10 ; analysis. 11 ; CHECK-LABEL: bb.1.then1: 12 ; CHECK-NOT: IMPLICIT_DEF 13 ; CHECK-NOT: INSERT_SUBREG 14 ; CHECK: sub_8bit_hi 15 ; CHECK-LABEL: bb.2.endif1: 16 17 define i16 @foo4(i32 %prec, i8 *%dst, i16 *%src) { 18 entry: 19 %cnd = icmp ne i32 %prec, 0 20 %t0 = load i16, i16 *%src, align 2 21 br i1 %cnd, label %then1, label %endif1 22 23 then1: 24 %shr = lshr i16 %t0, 8 25 %conv = trunc i16 %shr to i8 26 store i8 %conv, i8 *%dst, align 1 27 br label %endif1 28 29 endif1: 30 %t2 = phi i16 [0, %then1], [%t0, %entry] 31 ret i16 %t2 32 } 33
