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 7declare void @llvm.va_start(i8*) nounwind 8declare void @llvm.va_end(i8*) nounwind 9 10; CHECK-LABEL: test_byval_8_bytes_alignment: 11define void @test_byval_8_bytes_alignment(i32 %i, ...) { 12entry: 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 32define i32 @main() { 33entry: 34 call void (i32, ...)* @test_byval_8_bytes_alignment(i32 555, %struct_t* byval @static_val) 35 ret i32 0 36} 37 38declare 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 45define void @test_byval_8_bytes_alignment_fixed_arg(i32 %n1, %struct_t* byval %val) nounwind { 46entry: 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 59define i32 @main_fixed_arg() { 60entry: 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