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29af33b81d
The generated code for a funclet can have an add to sp in the epilogue for which there is no corresponding sub in the prologue. This patch removes the early return from emitPrologue that was preventing the sub to sp, and instead conditionalizes the appropriate parts of the rest of the function. Fixes https://bugs.llvm.org/show_bug.cgi?id=45345 Differential Revision: https://reviews.llvm.org/D77015
63 lines
2.1 KiB
LLVM
63 lines
2.1 KiB
LLVM
; RUN: llc -o - %s -mtriple=aarch64-windows | FileCheck %s
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; Check that the stack bump around a funclet is computed correctly in both the
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; prologue and epilogue in the case we have a MaxCallFrameSize > 0 and are doing alloca
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target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64-pc-windows-msvc19.25.28611"
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; // requires passing arguments on the stack
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; void test2(void*, int, int, int, int, int, int, int, int);
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;
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; // function with the funclet being checked
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; void test1(size_t bytes)
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; {
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; // alloca forces a separate callee save bump and stack bump
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; void *data = _alloca(bytes);
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; try {
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; test2(data, 0, 1, 2, 3, 4, 5, 6, 7);
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; } catch (...) {
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; // the funclet being checked
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; }
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; }
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; CHECK-LABEL: ?catch$2@?0??test1@@YAX_K@Z@4HA
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; CHECK: sub sp, sp, #16
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; CHECK: add sp, sp, #16
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; Function Attrs: uwtable
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define dso_local void @"?test1@@YAX_K@Z"(i64 %0) #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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%2 = alloca i64, align 8
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%3 = alloca i8*, align 8
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store i64 %0, i64* %2, align 8
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%4 = load i64, i64* %2, align 8
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%5 = alloca i8, i64 %4, align 16
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store i8* %5, i8** %3, align 8
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%6 = load i8*, i8** %3, align 8
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invoke void @"?test2@@YAXPEAXHHHHHHHH@Z"(i8* %6, i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7)
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to label %13 unwind label %7
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7: ; preds = %1
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%8 = catchswitch within none [label %9] unwind to caller
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9: ; preds = %7
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%10 = catchpad within %8 [i8* null, i32 64, i8* null]
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catchret from %10 to label %11
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11: ; preds = %9
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br label %12
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12: ; preds = %11, %13
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ret void
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13: ; preds = %1
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br label %12
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}
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declare dso_local void @"?test2@@YAXPEAXHHHHHHHH@Z"(i8*, i32, i32, i32, i32, i32, i32, i32, i32) #1
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declare dso_local i32 @__CxxFrameHandler3(...)
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attributes #0 = { uwtable }
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"wchar_size", i32 2}
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