1 ; RUN: llc < %s -relocation-model=static -realign-stack=1 -mcpu=yonah | FileCheck %s 2 3 ; The double argument is at 4(esp) which is 16-byte aligned, allowing us to 4 ; fold the load into the andpd. 5 6 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" 7 target triple = "i686-apple-darwin8" 8 @G = external global double 9 10 define void @test({ double, double }* byval %z, double* %P) nounwind { 11 entry: 12 %tmp3 = load double* @G, align 16 ; <double> [#uses=1] 13 %tmp4 = tail call double @fabs( double %tmp3 ) readnone ; <double> [#uses=1] 14 store volatile double %tmp4, double* %P 15 %tmp = getelementptr { double, double }* %z, i32 0, i32 0 ; <double*> [#uses=1] 16 %tmp1 = load volatile double* %tmp, align 8 ; <double> [#uses=1] 17 %tmp2 = tail call double @fabs( double %tmp1 ) readnone ; <double> [#uses=1] 18 ; CHECK: andpd{{.*}}4(%esp), %xmm 19 %tmp6 = fadd double %tmp4, %tmp2 ; <double> [#uses=1] 20 store volatile double %tmp6, double* %P, align 8 21 ret void 22 } 23 24 define void @test2() alignstack(16) nounwind { 25 entry: 26 ; CHECK: andl{{.*}}$-16, %esp 27 ret void 28 } 29 30 ; Use a call to force a spill. 31 define <2 x double> @test3(<2 x double> %x, <2 x double> %y) alignstack(32) nounwind { 32 entry: 33 ; CHECK: andl{{.*}}$-32, %esp 34 call void @test2() 35 %A = fmul <2 x double> %x, %y 36 ret <2 x double> %A 37 } 38 39 declare double @fabs(double) 40 41 ; The pointer is already known aligned, so and x,-16 is eliminable. 42 define i32 @test4() nounwind { 43 entry: 44 %buffer = alloca [2048 x i8], align 16 45 %0 = ptrtoint [2048 x i8]* %buffer to i32 46 %and = and i32 %0, -16 47 ret i32 %and 48 ; CHECK: test4: 49 ; CHECK-NOT: and 50 ; CHECK: ret 51 } 52
