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(ptr) nounwind 8declare void @llvm.va_end(ptr) nounwind 9 10; CHECK-LABEL: test_byval_8_bytes_alignment: 11define void @test_byval_8_bytes_alignment(i32 %i, ...) { 12entry: 13; CHECK: sub sp, sp, #16 14; CHECK: add r0, sp, #4 15; CHECK: stmib sp, {r1, r2, r3} 16 %g = alloca ptr 17 call void @llvm.va_start(ptr %g) 18 19; CHECK: add [[REG:(r[0-9]+)|(lr)]], {{(r[0-9]+)|(lr)}}, #7 20; CHECK: bic [[REG]], [[REG]], #7 21 %0 = va_arg ptr %g, double 22 call void @llvm.va_end(ptr %g) 23 24 ret void 25} 26 27; CHECK-LABEL: main: 28; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val 29; CHECK: movt [[BASE]], :upper16:static_val 30; ldm is not formed when the coalescer failed to coalesce everything. 31; CHECK: ldrd r2, [[TMP:r[0-9]+]], [[[BASE]]] 32; CHECK: movw r0, #555 33define i32 @main() { 34entry: 35 call void (i32, ...) @test_byval_8_bytes_alignment(i32 555, ptr byval(%struct_t) @static_val) 36 ret i32 0 37} 38 39declare void @f(double); 40 41; CHECK-LABEL: test_byval_8_bytes_alignment_fixed_arg: 42; CHECK-NOT: str r1 43; CHECK-DAG: str r3, [sp, #12] 44; CHECK-DAG: str r2, [sp, #8] 45; CHECK-NOT: str r1 46define void @test_byval_8_bytes_alignment_fixed_arg(i32 %n1, ptr byval(%struct_t) %val) nounwind { 47entry: 48 %0 = load double, ptr %val 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, ptr) @test_byval_8_bytes_alignment_fixed_arg(i32 555, ptr byval(%struct_t) @static_val) 62 ret i32 0 63} 64