1 ; RUN: llc < %s -verify-machineinstrs | FileCheck %s
2 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
3 target triple = "x86_64-apple-darwin10.0.0"
5 ; This test exercises the alias checking in SimpleRegisterCoalescing::RemoveCopyByCommutingDef.
7 define void @f(ptr %w, ptr %h, ptr %_this, ptr %image) nounwind ssp {
8 %x1 = tail call i64 @g(ptr %_this, ptr %image) nounwind ; <i64> [#uses=3]
9 %tmp1 = trunc i64 %x1 to i32 ; <i32> [#uses=1]
10 ; CHECK: movl (%r{{.*}}), %
11 %x4 = load i32, ptr %h, align 4 ; <i32> [#uses=1]
13 ; The imull clobbers a 32-bit register.
14 ; CHECK: imull %{{...}}, %e[[CLOBBER:..]]
15 %x5 = mul nsw i32 %x4, %tmp1 ; <i32> [#uses=1]
17 ; So we cannot use the corresponding 64-bit register anymore.
18 ; CHECK-NOT: shrq $32, %r[[CLOBBER]]
19 %btmp3 = lshr i64 %x1, 32 ; <i64> [#uses=1]
20 %btmp4 = trunc i64 %btmp3 to i32 ; <i32> [#uses=1]
23 %x6 = sdiv i32 %x5, %btmp4 ; <i32> [#uses=1]
24 store i32 %x6, ptr %w, align 4
28 declare i64 @g(ptr, ptr)