ca076f7a63
Rebase of #84114. I've only included the core changes to frame layout calculation & CFI generation which sidesteps the regressions found after merging #84114. Since these changes are a necessary precursor to the overall fix and are themselves slightly beneficial as CFI is now generated correctly, I think it is reasonable to merge this first step. --- For very large stack frames, the offset from the stack pointer to a local can be more than 2^31 which overflows various `int` offsets in the frame lowering code. This patch updates the frame lowering code to calculate the offsets as 64-bit values and fixes CFI to use the corrected sizes. After this patch, additional work is needed to fix offset truncations in each target's codegen.
72 lines
2.3 KiB
LLVM
72 lines
2.3 KiB
LLVM
; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-linux-gnu < %s \
|
|
; RUN: 2>&1 | FileCheck --check-prefix=CHECK-LE %s
|
|
; RUN: llc -verify-machineinstrs -mtriple=powerpc64-ibm-aix-xcoff < %s \
|
|
; RUN: 2>&1 | FileCheck --check-prefix=CHECK-BE %s
|
|
|
|
; CHECK-NOT: warning: {{.*}} stack frame size ({{.*}}) exceeds limit (4294967295) in function 'foo'
|
|
; CHECK-NOT: warning: {{.*}} stack frame size ({{.*}}) exceeds limit (4294967295) in function 'large_stack'
|
|
; CHECK: warning: {{.*}} stack frame size ({{.*}}) exceeds limit (4294967295) in function 'warn_on_large_stack'
|
|
|
|
declare void @bar(ptr)
|
|
|
|
define void @foo(i8 %x) {
|
|
; CHECK-LE-LABEL: foo:
|
|
; CHECK-LE: # %bb.0: # %entry
|
|
; CHECK-LE-NEXT: lis 0, -1
|
|
; CHECK-LE-NEXT: ori 0, 0, 65534
|
|
; CHECK-LE-NEXT: sldi 0, 0, 32
|
|
; CHECK-LE-NEXT: oris 0, 0, 65535
|
|
; CHECK-LE-NEXT: ori 0, 0, 65504
|
|
; CHECK-LE-NEXT: stdux 1, 1, 0
|
|
; CHECK-LE-NEXT: .cfi_def_cfa_offset 4294967328
|
|
; CHECK-LE-NEXT: li 4, 1
|
|
; CHECK-LE-NEXT: addi 5, 1, 32
|
|
; CHECK-LE-NEXT: stb 3, 32(1)
|
|
; CHECK-LE-NEXT: rldic 4, 4, 31, 32
|
|
; CHECK-LE-NEXT: stbx 3, 5, 4
|
|
; CHECK-LE-NEXT: li 4, -1
|
|
; CHECK-LE-NEXT: rldic 4, 4, 0, 32
|
|
; CHECK-LE-NEXT: stbx 3, 5, 4
|
|
; CHECK-LE-NEXT: ld 1, 0(1)
|
|
; CHECK-LE-NEXT: blr
|
|
;
|
|
; CHECK-BE-LABEL: foo:
|
|
; CHECK-BE: # %bb.0: # %entry
|
|
; CHECK-BE-NEXT: lis 0, -1
|
|
; CHECK-BE-NEXT: ori 0, 0, 65534
|
|
; CHECK-BE-NEXT: sldi 0, 0, 32
|
|
; CHECK-BE-NEXT: oris 0, 0, 65535
|
|
; CHECK-BE-NEXT: ori 0, 0, 65488
|
|
; CHECK-BE-NEXT: stdux 1, 1, 0
|
|
; CHECK-BE-NEXT: li 4, 1
|
|
; CHECK-BE-NEXT: addi 5, 1, 48
|
|
; CHECK-BE-NEXT: rldic 4, 4, 31, 32
|
|
; CHECK-BE-NEXT: stb 3, 48(1)
|
|
; CHECK-BE-NEXT: stbx 3, 5, 4
|
|
; CHECK-BE-NEXT: li 4, -1
|
|
; CHECK-BE-NEXT: rldic 4, 4, 0, 32
|
|
; CHECK-BE-NEXT: stbx 3, 5, 4
|
|
; CHECK-BE-NEXT: ld 1, 0(1)
|
|
; CHECK-BE-NEXT: blr
|
|
entry:
|
|
%a = alloca i8, i64 4294967296, align 16
|
|
%c = getelementptr i8, ptr %a, i64 2147483648
|
|
%d = getelementptr i8, ptr %a, i64 4294967295
|
|
store volatile i8 %x, ptr %a
|
|
store volatile i8 %x, ptr %c
|
|
store volatile i8 %x, ptr %d
|
|
ret void
|
|
}
|
|
|
|
define ptr @large_stack() {
|
|
%s = alloca [281474976710656 x i8], align 1
|
|
%e = getelementptr i8, ptr %s, i64 0
|
|
ret ptr %e
|
|
}
|
|
|
|
define ptr @warn_on_large_stack() "warn-stack-size"="4294967295" {
|
|
%s = alloca [281474976710656 x i8], align 1
|
|
%e = getelementptr i8, ptr %s, i64 0
|
|
ret ptr %e
|
|
}
|