1 // RUN: %clang_cc1 -triple armebv7-arm-none-eabi -emit-llvm -w -o - %s | FileCheck %s 2 3 // this tests for AAPCS section 5.4: 4 // A Composite Type not larger than 4 bytes is returned in r0. 5 // The format is as if the result had been stored in memory at a 6 // word-aligned address and then loaded into r0 with an LDR instruction 7 8 extern union Us { short s; } us; 9 union Us callee_us() { return us; } 10 // CHECK-LABEL: callee_us() 11 // CHECK: zext i16 12 // CHECK: shl 13 // CHECK: ret i32 14 15 void caller_us() { 16 us = callee_us(); 17 // CHECK-LABEL: caller_us() 18 // CHECK: call i32 19 // CHECK: lshr i32 20 // CHECK: trunc i32 21 } 22 23 extern struct Ss { short s; } ss; 24 struct Ss callee_ss() { return ss; } 25 // CHECK-LABEL: callee_ss() 26 // CHECK: zext i16 27 // CHECK: shl 28 // CHECK: ret i32 29 30 void caller_ss() { 31 ss = callee_ss(); 32 // CHECK-LABEL: caller_ss() 33 // CHECK: call i32 34 // CHECK: lshr i32 35 // CHECK: trunc i32 36 } 37 38
