1 ; RUN: llc < %s -mtriple=armv7-none-linux-gnueabi | FileCheck %s 2 ; Test that we correctly use registers and align elements when using va_arg 3 4 %struct_t = type { double, double, double } 5 @static_val = constant %struct_t { double 1.0, double 2.0, double 3.0 } 6 7 declare void @llvm.va_start(i8*) nounwind 8 declare void @llvm.va_end(i8*) nounwind 9 10 ; CHECK-LABEL: test_byval_8_bytes_alignment: 11 define void @test_byval_8_bytes_alignment(i32 %i, ...) { 12 entry: 13 ; CHECK: stm r0, {r1, r2, r3} 14 %g = alloca i8* 15 %g1 = bitcast i8** %g to i8* 16 call void @llvm.va_start(i8* %g1) 17 18 ; CHECK: add [[REG:(r[0-9]+)|(lr)]], {{(r[0-9]+)|(lr)}}, #7 19 ; CHECK: bfc [[REG]], #0, #3 20 %0 = va_arg i8** %g, double 21 call void @llvm.va_end(i8* %g1) 22 23 ret void 24 } 25 26 ; CHECK-LABEL: main: 27 ; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val 28 ; CHECK: movt [[BASE]], :upper16:static_val 29 ; ldm is not formed when the coalescer failed to coalesce everything. 30 ; CHECK: ldrd r2, [[TMP:r[0-9]+]], {{\[}}[[BASE]]{{\]}} 31 ; CHECK: movw r0, #555 32 define i32 @main() { 33 entry: 34 call void (i32, ...)* @test_byval_8_bytes_alignment(i32 555, %struct_t* byval @static_val) 35 ret i32 0 36 } 37 38 declare void @f(double); 39 40 ; CHECK-LABEL: test_byval_8_bytes_alignment_fixed_arg: 41 ; CHECK-NOT: str r1 42 ; CHECK: str r3, [sp, #12] 43 ; CHECK: str r2, [sp, #8] 44 ; CHECK-NOT: str r1 45 define void @test_byval_8_bytes_alignment_fixed_arg(i32 %n1, %struct_t* byval %val) nounwind { 46 entry: 47 %a = getelementptr inbounds %struct_t* %val, i32 0, i32 0 48 %0 = load double* %a 49 call void (double)* @f(double %0) 50 ret void 51 } 52 53 ; CHECK-LABEL: main_fixed_arg: 54 ; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val 55 ; CHECK: movt [[BASE]], :upper16:static_val 56 ; ldm is not formed when the coalescer failed to coalesce everything. 57 ; CHECK: ldrd r2, [[TMP:r[0-9]+]], {{\[}}[[BASE]]{{\]}} 58 ; CHECK: movw r0, #555 59 define i32 @main_fixed_arg() { 60 entry: 61 call void (i32, %struct_t*)* @test_byval_8_bytes_alignment_fixed_arg(i32 555, %struct_t* byval @static_val) 62 ret i32 0 63 } 64
