2015-04-09 16:49:47 +08:00
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; RUN: llc -verify-machineinstrs -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s
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; This test aims to check basic correctness of frame layout &
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; frame access code. There are 8 functions in this test file,
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; each function implements one element in the cartesian product
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; of:
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; . a function having a VLA/noVLA
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; . a function with dynamic stack realignment/no dynamic stack realignment.
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; . a function needing a frame pionter/no frame pointer,
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; since the presence/absence of these has influence on the frame
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; layout and which pointer to use to access various part of the
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; frame (bp,sp,fp).
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;
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; Furthermore: in every test function:
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; . there is always one integer and 1 floating point argument to be able
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; to check those are accessed correctly.
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; . there is always one local variable to check that is accessed
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; correctly
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;
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; The LLVM-IR below was produced by clang on the following C++ code:
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;extern "C" int g();
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;extern "C" int novla_nodynamicrealign_call(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
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; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
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;{
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; // use an argument passed on the stack.
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; volatile int l1;
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; return i10 + (int)d10 + l1 + g();
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;}
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;extern "C" int novla_nodynamicrealign_nocall(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
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; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
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;{
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; // use an argument passed on the stack.
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; volatile int l1;
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; return i10 + (int)d10 + l1;
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;}
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;extern "C" int novla_dynamicrealign_call(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
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; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
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;{
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; // use an argument passed on the stack.
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; alignas(128) volatile int l1;
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; return i10 + (int)d10 + l1 + g();
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;}
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;extern "C" int novla_dynamicrealign_nocall(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
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; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
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;{
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; // use an argument passed on the stack.
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; alignas(128) volatile int l1;
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; return i10 + (int)d10 + l1;
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;}
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;
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;extern "C" int vla_nodynamicrealign_call(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
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; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
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;{
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; // use an argument passed on the stack.
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; volatile int l1;
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; volatile int vla[i1];
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; return i10 + (int)d10 + l1 + g() + vla[0];
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;}
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;extern "C" int vla_nodynamicrealign_nocall(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
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; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
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;{
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; // use an argument passed on the stack.
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; volatile int l1;
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; volatile int vla[i1];
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; return i10 + (int)d10 + l1 + vla[0];
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;}
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;extern "C" int vla_dynamicrealign_call(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
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; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
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;{
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; // use an argument passed on the stack.
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; alignas(128) volatile int l1;
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; volatile int vla[i1];
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; return i10 + (int)d10 + l1 + g() + vla[0];
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;}
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;extern "C" int vla_dynamicrealign_nocall(int i1, int i2, int i3, int i4, int i5, int i6, int i7, int i8, int i9, int i10,
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; double d1, double d2, double d3, double d4, double d5, double d6, double d7, double d8, double d9, double d10)
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;{
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; // use an argument passed on the stack.
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; alignas(128) volatile int l1;
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; volatile int vla[i1];
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; return i10 + (int)d10 + l1 + vla[0];
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;}
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define i32 @novla_nodynamicrealign_call(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #0 {
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entry:
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%l1 = alloca i32, align 4
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%conv = fptosi double %d10 to i32
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%add = add nsw i32 %conv, %i10
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%l1.0.l1.0. = load volatile i32, i32* %l1, align 4
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%add1 = add nsw i32 %add, %l1.0.l1.0.
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%call = tail call i32 @g()
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%add2 = add nsw i32 %add1, %call
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ret i32 %add2
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}
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; CHECK-LABEL: novla_nodynamicrealign_call
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; CHECK: .cfi_startproc
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; Check that used callee-saved registers are saved
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; CHECK: stp x20, x19, [sp, #-32]!
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; Check that the frame pointer is created:
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; CHECK: stp x29, x30, [sp, #16]
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; CHECK: add x29, sp, #16
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; Check correctness of cfi pseudo-instructions
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; CHECK: .cfi_def_cfa w29, 16
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; CHECK: .cfi_offset w30, -8
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; CHECK: .cfi_offset w29, -16
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; CHECK: .cfi_offset w19, -24
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; CHECK: .cfi_offset w20, -32
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; Check correct access to arguments passed on the stack, through frame pointer
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; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
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; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
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; Check correct access to local variable on the stack, through stack pointer
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; CHECK: ldr w[[ILOC:[0-9]+]], [sp, #12]
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; Check epilogue:
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; CHECK: ldp x29, x30, [sp, #16]
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; CHECK: ldp x20, x19, [sp], #32
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; CHECK: ret
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; CHECK: .cfi_endproc
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declare i32 @g() #0
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; Function Attrs: nounwind
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define i32 @novla_nodynamicrealign_nocall(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
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entry:
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%l1 = alloca i32, align 4
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%conv = fptosi double %d10 to i32
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%add = add nsw i32 %conv, %i10
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%l1.0.l1.0. = load volatile i32, i32* %l1, align 4
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%add1 = add nsw i32 %add, %l1.0.l1.0.
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ret i32 %add1
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}
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; CHECK-LABEL: novla_nodynamicrealign_nocall
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; Check that space is reserved for one local variable on the stack.
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; CHECK: sub sp, sp, #16 // =16
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; Check correct access to arguments passed on the stack, through stack pointer
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; CHECK: ldr d[[DARG:[0-9]+]], [sp, #40]
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; CHECK: ldr w[[IARG:[0-9]+]], [sp, #24]
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; Check correct access to local variable on the stack, through stack pointer
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; CHECK: ldr w[[ILOC:[0-9]+]], [sp, #12]
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; Check epilogue:
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; CHECK: add sp, sp, #16 // =16
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; CHECK: ret
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define i32 @novla_dynamicrealign_call(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #0 {
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entry:
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%l1 = alloca i32, align 128
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%conv = fptosi double %d10 to i32
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%add = add nsw i32 %conv, %i10
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%l1.0.l1.0. = load volatile i32, i32* %l1, align 128
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%add1 = add nsw i32 %add, %l1.0.l1.0.
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%call = tail call i32 @g()
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%add2 = add nsw i32 %add1, %call
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ret i32 %add2
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}
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; CHECK-LABEL: novla_dynamicrealign_call
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; CHECK: .cfi_startproc
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; Check that used callee-saved registers are saved
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; CHECK: stp x20, x19, [sp, #-32]!
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; Check that the frame pointer is created:
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; CHECK: stp x29, x30, [sp, #16]
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; CHECK: add x29, sp, #16
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; Check the dynamic realignment of the stack pointer to a 128-byte boundary
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; CHECK: sub x9, sp, #96
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; CHECK: and sp, x9, #0xffffffffffffff80
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; Check correctness of cfi pseudo-instructions
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; CHECK: .cfi_def_cfa w29, 16
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; CHECK: .cfi_offset w30, -8
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; CHECK: .cfi_offset w29, -16
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; CHECK: .cfi_offset w19, -24
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; CHECK: .cfi_offset w20, -32
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; Check correct access to arguments passed on the stack, through frame pointer
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; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
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; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
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; Check correct access to local variable on the stack, through re-aligned stack pointer
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; CHECK: ldr w[[ILOC:[0-9]+]], [sp]
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; Check epilogue:
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; Check that stack pointer get restored from frame pointer.
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; CHECK: sub sp, x29, #16 // =16
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; CHECK: ldp x29, x30, [sp, #16]
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; CHECK: ldp x20, x19, [sp], #32
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; CHECK: ret
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; CHECK: .cfi_endproc
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; Function Attrs: nounwind
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define i32 @novla_dynamicrealign_nocall(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
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entry:
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%l1 = alloca i32, align 128
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%conv = fptosi double %d10 to i32
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%add = add nsw i32 %conv, %i10
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%l1.0.l1.0. = load volatile i32, i32* %l1, align 128
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%add1 = add nsw i32 %add, %l1.0.l1.0.
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ret i32 %add1
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}
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; CHECK-LABEL: novla_dynamicrealign_nocall
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; Check that the frame pointer is created:
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; CHECK: stp x29, x30, [sp, #-16]!
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; CHECK: mov x29, sp
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; Check the dynamic realignment of the stack pointer to a 128-byte boundary
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; CHECK: sub x9, sp, #112
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; CHECK: and sp, x9, #0xffffffffffffff80
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; Check correct access to arguments passed on the stack, through frame pointer
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; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
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; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
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; Check correct access to local variable on the stack, through re-aligned stack pointer
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; CHECK: ldr w[[ILOC:[0-9]+]], [sp]
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; Check epilogue:
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; Check that stack pointer get restored from frame pointer.
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; CHECK: mov sp, x29
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; CHECK: ldp x29, x30, [sp], #16
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; CHECK: ret
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define i32 @vla_nodynamicrealign_call(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #0 {
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entry:
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%l1 = alloca i32, align 4
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%0 = zext i32 %i1 to i64
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%vla = alloca i32, i64 %0, align 4
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%conv = fptosi double %d10 to i32
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%add = add nsw i32 %conv, %i10
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%l1.0.l1.0. = load volatile i32, i32* %l1, align 4
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%add1 = add nsw i32 %add, %l1.0.l1.0.
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%call = tail call i32 @g()
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%add2 = add nsw i32 %add1, %call
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%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
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%add3 = add nsw i32 %add2, %1
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ret i32 %add3
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}
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; CHECK-LABEL: vla_nodynamicrealign_call
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; CHECK: .cfi_startproc
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; Check that used callee-saved registers are saved
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; CHECK: stp x20, x19, [sp, #-32]!
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; Check that the frame pointer is created:
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; CHECK: stp x29, x30, [sp, #16]
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; CHECK: add x29, sp, #16
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; Check that space is reserved on the stack for the local variable,
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; rounded up to a multiple of 16 to keep the stack pointer 16-byte aligned.
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; CHECK: sub sp, sp, #16
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; Check correctness of cfi pseudo-instructions
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; CHECK: .cfi_def_cfa w29, 16
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; CHECK: .cfi_offset w30, -8
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; CHECK: .cfi_offset w29, -16
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; CHECK: .cfi_offset w19, -24
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; CHECK: .cfi_offset w20, -32
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; Check correct access to arguments passed on the stack, through frame pointer
|
|
|
|
|
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
|
|
|
|
|
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
|
|
|
|
|
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
|
2015-07-30 05:34:32 +08:00
|
|
|
; CHECK: mov w9, w0
|
|
|
|
|
; CHECK: mov x10, sp
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: lsl x9, x9, #2
|
|
|
|
|
; CHECK: add x9, x9, #15
|
2015-07-11 02:29:02 +08:00
|
|
|
; CHECK: and x9, x9, #0x7fffffff0
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
|
|
|
|
|
; CHECK: mov sp, x[[VLASPTMP]]
|
|
|
|
|
; Check correct access to local variable, through frame pointer
|
|
|
|
|
; CHECK: ldur w[[ILOC:[0-9]+]], [x29, #-20]
|
|
|
|
|
; Check correct accessing of the VLA variable through the base pointer
|
|
|
|
|
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
|
|
|
|
|
; Check epilogue:
|
|
|
|
|
; Check that stack pointer get restored from frame pointer.
|
|
|
|
|
; CHECK: sub sp, x29, #16 // =16
|
|
|
|
|
; CHECK: ldp x29, x30, [sp, #16]
|
|
|
|
|
; CHECK: ldp x20, x19, [sp], #32
|
|
|
|
|
; CHECK: ret
|
|
|
|
|
; CHECK: .cfi_endproc
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
; Function Attrs: nounwind
|
|
|
|
|
define i32 @vla_nodynamicrealign_nocall(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
|
|
|
|
|
entry:
|
|
|
|
|
%l1 = alloca i32, align 4
|
|
|
|
|
%0 = zext i32 %i1 to i64
|
|
|
|
|
%vla = alloca i32, i64 %0, align 4
|
|
|
|
|
%conv = fptosi double %d10 to i32
|
|
|
|
|
%add = add nsw i32 %conv, %i10
|
|
|
|
|
%l1.0.l1.0. = load volatile i32, i32* %l1, align 4
|
|
|
|
|
%add1 = add nsw i32 %add, %l1.0.l1.0.
|
|
|
|
|
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
|
|
|
|
|
%add2 = add nsw i32 %add1, %1
|
|
|
|
|
ret i32 %add2
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; CHECK-LABEL: vla_nodynamicrealign_nocall
|
|
|
|
|
; Check that the frame pointer is created:
|
|
|
|
|
; CHECK: stp x29, x30, [sp, #-16]!
|
|
|
|
|
; CHECK: mov x29, sp
|
|
|
|
|
; Check that space is reserved on the stack for the local variable,
|
|
|
|
|
; rounded up to a multiple of 16 to keep the stack pointer 16-byte aligned.
|
|
|
|
|
; CHECK: sub sp, sp, #16
|
|
|
|
|
; Check correctness of cfi pseudo-instructions
|
|
|
|
|
; Check correct access to arguments passed on the stack, through frame pointer
|
|
|
|
|
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
|
|
|
|
|
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
|
|
|
|
|
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
|
2015-07-30 05:34:32 +08:00
|
|
|
; CHECK: mov w9, w0
|
|
|
|
|
; CHECK: mov x10, sp
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: lsl x9, x9, #2
|
|
|
|
|
; CHECK: add x9, x9, #15
|
2015-07-11 02:29:02 +08:00
|
|
|
; CHECK: and x9, x9, #0x7fffffff0
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
|
|
|
|
|
; CHECK: mov sp, x[[VLASPTMP]]
|
|
|
|
|
; Check correct access to local variable, through frame pointer
|
|
|
|
|
; CHECK: ldur w[[ILOC:[0-9]+]], [x29, #-4]
|
|
|
|
|
; Check correct accessing of the VLA variable through the base pointer
|
|
|
|
|
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
|
|
|
|
|
; Check epilogue:
|
|
|
|
|
; Check that stack pointer get restored from frame pointer.
|
|
|
|
|
; CHECK: mov sp, x29
|
|
|
|
|
; CHECK: ldp x29, x30, [sp], #16
|
|
|
|
|
; CHECK: ret
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
define i32 @vla_dynamicrealign_call(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #0 {
|
|
|
|
|
entry:
|
|
|
|
|
%l1 = alloca i32, align 128
|
|
|
|
|
%0 = zext i32 %i1 to i64
|
|
|
|
|
%vla = alloca i32, i64 %0, align 4
|
|
|
|
|
%conv = fptosi double %d10 to i32
|
|
|
|
|
%add = add nsw i32 %conv, %i10
|
|
|
|
|
%l1.0.l1.0. = load volatile i32, i32* %l1, align 128
|
|
|
|
|
%add1 = add nsw i32 %add, %l1.0.l1.0.
|
|
|
|
|
%call = tail call i32 @g()
|
|
|
|
|
%add2 = add nsw i32 %add1, %call
|
|
|
|
|
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
|
|
|
|
|
%add3 = add nsw i32 %add2, %1
|
|
|
|
|
ret i32 %add3
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; CHECK-LABEL: vla_dynamicrealign_call
|
|
|
|
|
; CHECK: .cfi_startproc
|
|
|
|
|
; Check that used callee-saved registers are saved
|
|
|
|
|
; CHECK: stp x22, x21, [sp, #-48]!
|
|
|
|
|
; CHECK: stp x20, x19, [sp, #16]
|
|
|
|
|
; Check that the frame pointer is created:
|
|
|
|
|
; CHECK: stp x29, x30, [sp, #32]
|
|
|
|
|
; CHECK: add x29, sp, #32
|
|
|
|
|
; Check that the stack pointer gets re-aligned to 128
|
|
|
|
|
; bytes & the base pointer (x19) gets initialized to
|
|
|
|
|
; this 128-byte aligned area for local variables &
|
|
|
|
|
; spill slots
|
|
|
|
|
; CHECK: sub x9, sp, #80 // =80
|
|
|
|
|
; CHECK: and sp, x9, #0xffffffffffffff80
|
|
|
|
|
; CHECK: mov x19, sp
|
|
|
|
|
; Check correctness of cfi pseudo-instructions
|
|
|
|
|
; CHECK: .cfi_def_cfa w29, 16
|
|
|
|
|
; CHECK: .cfi_offset w30, -8
|
|
|
|
|
; CHECK: .cfi_offset w29, -16
|
|
|
|
|
; CHECK: .cfi_offset w19, -24
|
|
|
|
|
; CHECK: .cfi_offset w20, -32
|
|
|
|
|
; CHECK: .cfi_offset w21, -40
|
|
|
|
|
; CHECK: .cfi_offset w22, -48
|
|
|
|
|
; Check correct access to arguments passed on the stack, through frame pointer
|
|
|
|
|
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
|
|
|
|
|
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
|
|
|
|
|
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
|
|
|
|
|
; and set-up of base pointer (x19).
|
2015-07-30 05:34:32 +08:00
|
|
|
; CHECK: mov w9, w0
|
|
|
|
|
; CHECK: mov x10, sp
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: lsl x9, x9, #2
|
|
|
|
|
; CHECK: add x9, x9, #15
|
2015-07-11 02:29:02 +08:00
|
|
|
; CHECK: and x9, x9, #0x7fffffff0
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
|
|
|
|
|
; CHECK: mov sp, x[[VLASPTMP]]
|
|
|
|
|
; Check correct access to local variable, through base pointer
|
|
|
|
|
; CHECK: ldr w[[ILOC:[0-9]+]], [x19]
|
|
|
|
|
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
|
|
|
|
|
; Check epilogue:
|
|
|
|
|
; Check that stack pointer get restored from frame pointer.
|
|
|
|
|
; CHECK: sub sp, x29, #32
|
|
|
|
|
; CHECK: ldp x29, x30, [sp, #32]
|
|
|
|
|
; CHECK: ldp x20, x19, [sp, #16]
|
|
|
|
|
; CHECK: ldp x22, x21, [sp], #48
|
|
|
|
|
; CHECK: ret
|
|
|
|
|
; CHECK: .cfi_endproc
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
; Function Attrs: nounwind
|
|
|
|
|
define i32 @vla_dynamicrealign_nocall(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
|
|
|
|
|
entry:
|
|
|
|
|
%l1 = alloca i32, align 128
|
|
|
|
|
%0 = zext i32 %i1 to i64
|
|
|
|
|
%vla = alloca i32, i64 %0, align 4
|
|
|
|
|
%conv = fptosi double %d10 to i32
|
|
|
|
|
%add = add nsw i32 %conv, %i10
|
|
|
|
|
%l1.0.l1.0. = load volatile i32, i32* %l1, align 128
|
|
|
|
|
%add1 = add nsw i32 %add, %l1.0.l1.0.
|
|
|
|
|
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
|
|
|
|
|
%add2 = add nsw i32 %add1, %1
|
|
|
|
|
ret i32 %add2
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; CHECK-LABEL: vla_dynamicrealign_nocall
|
|
|
|
|
; Check that used callee-saved registers are saved
|
|
|
|
|
; CHECK: stp x20, x19, [sp, #-32]!
|
|
|
|
|
; Check that the frame pointer is created:
|
|
|
|
|
; CHECK: stp x29, x30, [sp, #16]
|
|
|
|
|
; CHECK: add x29, sp, #16
|
|
|
|
|
; Check that the stack pointer gets re-aligned to 128
|
|
|
|
|
; bytes & the base pointer (x19) gets initialized to
|
|
|
|
|
; this 128-byte aligned area for local variables &
|
|
|
|
|
; spill slots
|
|
|
|
|
; CHECK: sub x9, sp, #96
|
|
|
|
|
; CHECK: and sp, x9, #0xffffffffffffff80
|
|
|
|
|
; CHECK: mov x19, sp
|
|
|
|
|
; Check correct access to arguments passed on the stack, through frame pointer
|
|
|
|
|
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
|
|
|
|
|
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
|
|
|
|
|
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
|
|
|
|
|
; and set-up of base pointer (x19).
|
2015-07-30 05:34:32 +08:00
|
|
|
; CHECK: mov w9, w0
|
|
|
|
|
; CHECK: mov x10, sp
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: lsl x9, x9, #2
|
|
|
|
|
; CHECK: add x9, x9, #15
|
2015-07-11 02:29:02 +08:00
|
|
|
; CHECK: and x9, x9, #0x7fffffff0
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
|
|
|
|
|
; CHECK: mov sp, x[[VLASPTMP]]
|
|
|
|
|
; Check correct access to local variable, through base pointer
|
|
|
|
|
; CHECK: ldr w[[ILOC:[0-9]+]], [x19]
|
|
|
|
|
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
|
|
|
|
|
; Check epilogue:
|
|
|
|
|
; Check that stack pointer get restored from frame pointer.
|
|
|
|
|
; CHECK: sub sp, x29, #16
|
|
|
|
|
; CHECK: ldp x29, x30, [sp, #16]
|
|
|
|
|
; CHECK: ldp x20, x19, [sp], #32
|
|
|
|
|
; CHECK: ret
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
; Function Attrs: nounwind
|
|
|
|
|
define i32 @vla_dynamicrealign_nocall_large_align(i32 %i1, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i32 %i10, double %d1, double %d2, double %d3, double %d4, double %d5, double %d6, double %d7, double %d8, double %d9, double %d10) #1 {
|
|
|
|
|
entry:
|
|
|
|
|
%l1 = alloca i32, align 32768
|
|
|
|
|
%0 = zext i32 %i1 to i64
|
|
|
|
|
%vla = alloca i32, i64 %0, align 4
|
|
|
|
|
%conv = fptosi double %d10 to i32
|
|
|
|
|
%add = add nsw i32 %conv, %i10
|
|
|
|
|
%l1.0.l1.0. = load volatile i32, i32* %l1, align 32768
|
|
|
|
|
%add1 = add nsw i32 %add, %l1.0.l1.0.
|
|
|
|
|
%1 = load volatile i32, i32* %vla, align 4, !tbaa !1
|
|
|
|
|
%add2 = add nsw i32 %add1, %1
|
|
|
|
|
ret i32 %add2
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; CHECK-LABEL: vla_dynamicrealign_nocall_large_align
|
|
|
|
|
; Check that used callee-saved registers are saved
|
|
|
|
|
; CHECK: stp x20, x19, [sp, #-32]!
|
|
|
|
|
; Check that the frame pointer is created:
|
|
|
|
|
; CHECK: stp x29, x30, [sp, #16]
|
|
|
|
|
; CHECK: add x29, sp, #16
|
|
|
|
|
; Check that the stack pointer gets re-aligned to 128
|
|
|
|
|
; bytes & the base pointer (x19) gets initialized to
|
|
|
|
|
; this 128-byte aligned area for local variables &
|
|
|
|
|
; spill slots
|
|
|
|
|
; CHECK: sub x9, sp, #7, lsl #12
|
|
|
|
|
; CHECK: and sp, x9, #0xffffffffffff8000
|
|
|
|
|
; CHECK: mov x19, sp
|
|
|
|
|
; Check correct access to arguments passed on the stack, through frame pointer
|
|
|
|
|
; CHECK: ldr w[[IARG:[0-9]+]], [x29, #24]
|
|
|
|
|
; CHECK: ldr d[[DARG:[0-9]+]], [x29, #40]
|
|
|
|
|
; Check correct reservation of 16-byte aligned VLA (size in w0) on stack
|
|
|
|
|
; and set-up of base pointer (x19).
|
2015-07-30 05:34:32 +08:00
|
|
|
; CHECK: mov w9, w0
|
|
|
|
|
; CHECK: mov x10, sp
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: lsl x9, x9, #2
|
|
|
|
|
; CHECK: add x9, x9, #15
|
2015-07-11 02:29:02 +08:00
|
|
|
; CHECK: and x9, x9, #0x7fffffff0
|
2015-04-09 16:49:47 +08:00
|
|
|
; CHECK: sub x[[VLASPTMP:[0-9]+]], x10, x9
|
|
|
|
|
; CHECK: mov sp, x[[VLASPTMP]]
|
|
|
|
|
; Check correct access to local variable, through base pointer
|
|
|
|
|
; CHECK: ldr w[[ILOC:[0-9]+]], [x19]
|
|
|
|
|
; CHECK: ldr w[[VLA:[0-9]+]], [x[[VLASPTMP]]]
|
|
|
|
|
; Check epilogue:
|
|
|
|
|
; Check that stack pointer get restored from frame pointer.
|
|
|
|
|
; CHECK: sub sp, x29, #16
|
|
|
|
|
; CHECK: ldp x29, x30, [sp, #16]
|
|
|
|
|
; CHECK: ldp x20, x19, [sp], #32
|
|
|
|
|
; CHECK: ret
|
|
|
|
|
|
2015-07-11 05:24:07 +08:00
|
|
|
|
|
|
|
|
define void @realign_conditional(i1 %b) {
|
|
|
|
|
entry:
|
|
|
|
|
br i1 %b, label %bb0, label %bb1
|
|
|
|
|
|
|
|
|
|
bb0:
|
|
|
|
|
%MyAlloca = alloca i8, i64 64, align 32
|
|
|
|
|
br label %bb1
|
|
|
|
|
|
|
|
|
|
bb1:
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; CHECK-LABEL: realign_conditional
|
|
|
|
|
; No realignment in the prologue.
|
|
|
|
|
; CHECK-NOT: and
|
|
|
|
|
; CHECK-NOT: 0xffffffffffffffe0
|
|
|
|
|
; CHECK: tbz {{.*}} .[[LABEL:.*]]
|
|
|
|
|
; Stack is realigned in a non-entry BB.
|
|
|
|
|
; CHECK: sub [[REG:x[01-9]+]], sp, #64
|
|
|
|
|
; CHECK: and sp, [[REG]], #0xffffffffffffffe0
|
|
|
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; CHECK: .[[LABEL]]:
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; CHECK: ret
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define void @realign_conditional2(i1 %b) {
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entry:
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%tmp = alloca i8, i32 4
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br i1 %b, label %bb0, label %bb1
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bb0:
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%MyAlloca = alloca i8, i64 64, align 32
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br label %bb1
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bb1:
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ret void
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}
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; CHECK-LABEL: realign_conditional2
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; Extra realignment in the prologue (performance issue).
|
2015-11-19 07:12:20 +08:00
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; CHECK: tbz {{.*}} .[[LABEL:.*]]
|
2015-07-11 05:24:07 +08:00
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; CHECK: sub x9, sp, #32 // =32
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|
; CHECK: and sp, x9, #0xffffffffffffffe0
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|
; CHECK: mov x19, sp
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|
; Stack is realigned in a non-entry BB.
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; CHECK: sub [[REG:x[01-9]+]], sp, #64
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|
; CHECK: and sp, [[REG]], #0xffffffffffffffe0
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|
; CHECK: .[[LABEL]]:
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; CHECK: ret
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|
2015-04-09 16:49:47 +08:00
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|
attributes #0 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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|
attributes #1 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!1 = !{!2, !2, i64 0}
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!2 = !{!"int", !3, i64 0}
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!3 = !{!"omnipotent char", !4, i64 0}
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!4 = !{!"Simple C/C++ TBAA"}
|
