clang/test/CodeGen/RISCV/riscv32-ilp32-abi.c

   1 // RUN: %clang_cc1 -triple riscv32 -emit-llvm %s -o - | FileCheck %s
   2
   3 // This file contains test cases that will have different output for ilp32 vs
   4 // the other 32-bit ABIs.
   5
   6 #include <stddef.h>
   7 #include <stdint.h>
   8
   9 struct tiny {
  10   uint8_t a, b, c, d;
  11 };
  12
  13 struct small {
  14   int32_t a, *b;
  15 };
  16
  17 struct small_aligned {
  18   int64_t a;
  19 };
  20
  21 struct large {
  22   int32_t a, b, c, d;
  23 };
  24
  25 // Scalars passed on the stack should have signext/zeroext attributes, just as
  26 // if they were passed in registers.
  27
  28 // CHECK-LABEL: define{{.*}} i32 @f_scalar_stack_1(i32 noundef %a, i64 noundef %b, float noundef %c, double noundef %d, fp128 noundef %e, i8 noundef zeroext %f, i8 noundef signext %g, i8 noundef zeroext %h)
  29 int f_scalar_stack_1(int32_t a, int64_t b, float c, double d, long double e,
  30                      uint8_t f, int8_t g, uint8_t h) {
  31   return g + h;
  32 }
  33
  34 // CHECK-LABEL: define{{.*}} void @f_scalar_stack_2(ptr noalias sret(%struct.large) align 4 %agg.result, float noundef %a, i64 noundef %b, double noundef %c, fp128 noundef %d, i8 noundef zeroext %e, i8 noundef signext %f, i8 noundef zeroext %g)
  35 struct large f_scalar_stack_2(float a, int64_t b, double c, long double d,
  36                               uint8_t e, int8_t f, uint8_t g) {
  37   return (struct large){a, e, f, g};
  38 }
  39
  40 // Aggregates and >=XLen scalars passed on the stack should be lowered just as
  41 // they would be if passed via registers.
  42
  43 // CHECK-LABEL: define{{.*}} void @f_scalar_stack_3(double noundef %a, i64 noundef %b, double noundef %c, i64 noundef %d, i32 noundef %e, i64 noundef %f, float noundef %g, double noundef %h, fp128 noundef %i)
  44 void f_scalar_stack_3(double a, int64_t b, double c, int64_t d, int e,
  45                       int64_t f, float g, double h, long double i) {}
  46
  47 // CHECK-LABEL: define{{.*}} void @f_agg_stack(double noundef %a, i64 noundef %b, double noundef %c, i64 noundef %d, i32 %e.coerce, [2 x i32] %f.coerce, i64 %g.coerce, ptr noundef %h)
  48 void f_agg_stack(double a, int64_t b, double c, int64_t d, struct tiny e,
  49                  struct small f, struct small_aligned g, struct large h) {}