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" 4 5 ; This test exercises the alias checking in SimpleRegisterCoalescing::RemoveCopyByCommutingDef. 6 7 define void @f(i32* %w, i32* %h, i8* %_this, i8* %image) nounwind ssp { 8 %x1 = tail call i64 @g(i8* %_this, i8* %image) nounwind ; <i64> [#uses=3] 9 %tmp1 = trunc i64 %x1 to i32 ; <i32> [#uses=1] 10 ; CHECK: movl (%r{{.*}}), % 11 %x4 = load i32* %h, align 4 ; <i32> [#uses=1] 12 13 ; The imull clobbers a 32-bit register. 14 ; CHECK: imull %{{...}}, %e[[CLOBBER:..]] 15 %x5 = mul nsw i32 %x4, %tmp1 ; <i32> [#uses=1] 16 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] 21 22 ; CHECK: idiv 23 %x6 = sdiv i32 %x5, %btmp4 ; <i32> [#uses=1] 24 store i32 %x6, i32* %w, align 4 25 ret void 26 } 27 28 declare i64 @g(i8*, i8*) 29
