71a2e8fa18
Wnen argument on stack needs to be zero extended, we can't omit ld/st
pair, because we may get an undefined value in certain conditions. (e.g
the code below will print 0xFFFFFFFF00000042 instead of 0x42)
```
[[gnu::noinline]]
void baz(int, int, int, int, int, int, int, int, long v)
{
printf("Value of v: %#lx\n", v);
}
[[gnu::noinline]]
void bar(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, unsigned v)
{
baz(i1, i2, i3, i4, i5, i6, i7, i8, v);
}
[[gnu::noinline]]
void foo(int=1, int=2, int=3, int=4, int=5, int=6, int=7, int=8, uint64_t dummy=-1ULL)
{
bar(1, 2, 3, 4, 5, 6, 7, 8, 0x42)
}
```
81 lines
3.2 KiB
LLVM
81 lines
3.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
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; RUN: llc %s -mtriple=aarch64 -o - | FileCheck %s --check-prefixes=CHECK,SDAG
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; RUN: llc %s -mtriple=aarch64 -global-isel -o - | FileCheck %s --check-prefixes=CHECK,GI
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; Tail calls which have stack arguments in the same offsets as the caller do not
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; need to load and store the arguments from the stack.
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declare void @func(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j)
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define void @wrapper_func(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j) {
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; CHECK-LABEL: wrapper_func:
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; CHECK: // %bb.0:
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; CHECK-NEXT: b func
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tail call void @func(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j)
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ret void
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}
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define void @wrapper_func_zero_arg(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j) {
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; CHECK-LABEL: wrapper_func_zero_arg:
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; CHECK: // %bb.0:
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; CHECK-NEXT: str wzr, [sp, #8]
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; CHECK-NEXT: b func
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tail call void @func(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 0)
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ret void
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}
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define void @wrapper_func_overriden_arg(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j) {
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; CHECK-LABEL: wrapper_func_overriden_arg:
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; CHECK: // %bb.0:
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; CHECK-NEXT: ldr w8, [sp]
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; CHECK-NEXT: str wzr, [sp]
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; CHECK-NEXT: str w8, [sp, #8]
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; CHECK-NEXT: b func
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tail call void @func(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 0, i32 %i)
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ret void
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}
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declare void @func_i1(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i1 %j)
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; FIXME: Support i1 passthrough stack arguments in GlobalISel.
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define void @wrapper_func_i1(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i1 %j) {
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; SDAG-LABEL: wrapper_func_i1:
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; SDAG: // %bb.0:
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; SDAG-NEXT: b func_i1
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;
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; GI-LABEL: wrapper_func_i1:
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; GI: // %bb.0:
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; GI-NEXT: ldrb w8, [sp, #8]
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; GI-NEXT: strb w8, [sp, #8]
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; GI-NEXT: b func_i1
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tail call void @func_i1(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i1 %j)
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ret void
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}
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declare void @func_signext_i1(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i1 signext %j)
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; FIXME: Support zero/sign-extended stack arguments.
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define void @wrapper_func_i8(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i1 signext %j) {
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; CHECK-LABEL: wrapper_func_i8:
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; CHECK: // %bb.0:
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; CHECK-NEXT: ldrsb w8, [sp, #8]
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; CHECK-NEXT: strb w8, [sp, #8]
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; CHECK-NEXT: b func_signext_i1
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tail call void @func_signext_i1(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i1 signext %j)
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ret void
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}
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declare void @func_i64(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i64 %j)
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define void @wrapper_func_i64(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j) {
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; CHECK-LABEL: wrapper_func_i64:
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; CHECK: // %bb.0:
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; CHECK-NEXT: ldr w8, [sp, #8]
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; CHECK-NEXT: str x8, [sp, #8]
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; CHECK-NEXT: b func_i64
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%conv = zext i32 %j to i64
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tail call void @func_i64(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i64 %conv)
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ret void
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}
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