[CodeGen][PowerPC] Add codegen test for global stack canary

Make sure the code generated for a global stack guard canary
references __stack_chk_guard before and after intervening function
code.

Signed-off-by: Keith Packard <[email protected]>

Author: keith-packard

llvm/test/CodeGen/PowerPC/stack-guard-global.ll

@@ -0,0 +1,122 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=powerpc64 -verify-machineinstrs < %s \
+; RUN:     | FileCheck %s --check-prefixes=BE64
+; RUN: llc -mtriple=powerpc64le -verify-machineinstrs < %s \
+; RUN:     | FileCheck %s --check-prefixes=LE64
+; RUN: llc -mtriple=ppc32 -verify-machineinstrs < %s \
+; RUN:     | FileCheck %s --check-prefixes=LE32
+
+define void @foo(i64 %t) sspstrong nounwind {
+; BE64-LABEL: foo:
+; BE64:       # %bb.0:
+; BE64-NEXT:    mflr 0
+; BE64-NEXT:    std 31, -8(1)
+; BE64-NEXT:    stdu 1, -144(1)
+; BE64-NEXT:    mr 31, 1
+; BE64-NEXT:    std 0, 160(1)
+; BE64-NEXT:    std 30, 128(31) # 8-byte Folded Spill
+; BE64-NEXT:    addis 30, 2, __stack_chk_guard@toc@ha
+; BE64-NEXT:    sldi 3, 3, 2
+; BE64-NEXT:    ld 4, __stack_chk_guard@toc@l(30)
+; BE64-NEXT:    addi 3, 3, 15
+; BE64-NEXT:    rldicr 3, 3, 0, 59
+; BE64-NEXT:    neg 3, 3
+; BE64-NEXT:    std 4, 120(31)
+; BE64-NEXT:    addi 4, 31, 144
+; BE64-NEXT:    stdux 4, 1, 3
+; BE64-NEXT:    addi 3, 1, 112
+; BE64-NEXT:    bl baz
+; BE64-NEXT:    nop
+; BE64-NEXT:    ld 3, __stack_chk_guard@toc@l(30)
+; BE64-NEXT:    ld 4, 120(31)
+; BE64-NEXT:    cmpld 3, 4
+; BE64-NEXT:    bne 0, .LBB0_2
+; BE64-NEXT:  # %bb.1:
+; BE64-NEXT:    ld 30, 128(31) # 8-byte Folded Reload
+; BE64-NEXT:    ld 1, 0(1)
+; BE64-NEXT:    ld 0, 16(1)
+; BE64-NEXT:    ld 31, -8(1)
+; BE64-NEXT:    mtlr 0
+; BE64-NEXT:    blr
+; BE64-NEXT:  .LBB0_2:
+; BE64-NEXT:    bl __stack_chk_fail
+; BE64-NEXT:    nop
+;
+; LE64-LABEL: foo:
+; LE64:       # %bb.0:
+; LE64-NEXT:    mflr 0
+; LE64-NEXT:    std 31, -8(1)
+; LE64-NEXT:    stdu 1, -64(1)
+; LE64-NEXT:    mr 31, 1
+; LE64-NEXT:    sldi 3, 3, 2
+; LE64-NEXT:    std 0, 80(1)
+; LE64-NEXT:    std 30, 48(31) # 8-byte Folded Spill
+; LE64-NEXT:    addis 30, 2, __stack_chk_guard@toc@ha
+; LE64-NEXT:    addi 3, 3, 15
+; LE64-NEXT:    ld 4, __stack_chk_guard@toc@l(30)
+; LE64-NEXT:    rldicr 3, 3, 0, 59
+; LE64-NEXT:    neg 3, 3
+; LE64-NEXT:    std 4, 40(31)
+; LE64-NEXT:    addi 4, 31, 64
+; LE64-NEXT:    stdux 4, 1, 3
+; LE64-NEXT:    addi 3, 1, 32
+; LE64-NEXT:    bl baz
+; LE64-NEXT:    nop
+; LE64-NEXT:    ld 3, __stack_chk_guard@toc@l(30)
+; LE64-NEXT:    ld 4, 40(31)
+; LE64-NEXT:    cmpld 3, 4
+; LE64-NEXT:    bne 0, .LBB0_2
+; LE64-NEXT:  # %bb.1:
+; LE64-NEXT:    ld 30, 48(31) # 8-byte Folded Reload
+; LE64-NEXT:    ld 1, 0(1)
+; LE64-NEXT:    ld 0, 16(1)
+; LE64-NEXT:    ld 31, -8(1)
+; LE64-NEXT:    mtlr 0
+; LE64-NEXT:    blr
+; LE64-NEXT:  .LBB0_2:
+; LE64-NEXT:    bl __stack_chk_fail
+; LE64-NEXT:    nop
+;
+; LE32-LABEL: foo:
+; LE32:       # %bb.0:
+; LE32-NEXT:    mflr 0
+; LE32-NEXT:    stwu 1, -32(1)
+; LE32-NEXT:    stw 31, 28(1)
+; LE32-NEXT:    mr 31, 1
+; LE32-NEXT:    stw 0, 36(1)
+; LE32-NEXT:    slwi 4, 4, 2
+; LE32-NEXT:    stw 30, 24(31) # 4-byte Folded Spill
+; LE32-NEXT:    lis 30, __stack_chk_guard@ha
+; LE32-NEXT:    lwz 3, __stack_chk_guard@l(30)
+; LE32-NEXT:    addi 4, 4, 15
+; LE32-NEXT:    rlwinm 4, 4, 0, 0, 27
+; LE32-NEXT:    neg 4, 4
+; LE32-NEXT:    stw 3, 20(31)
+; LE32-NEXT:    addi 3, 31, 32
+; LE32-NEXT:    stwux 3, 1, 4
+; LE32-NEXT:    addi 3, 1, 16
+; LE32-NEXT:    bl baz
+; LE32-NEXT:    lwz 3, __stack_chk_guard@l(30)
+; LE32-NEXT:    lwz 4, 20(31)
+; LE32-NEXT:    cmplw 3, 4
+; LE32-NEXT:    bne 0, .LBB0_2
+; LE32-NEXT:  # %bb.1:
+; LE32-NEXT:    lwz 30, 24(31) # 4-byte Folded Reload
+; LE32-NEXT:    lwz 31, 0(1)
+; LE32-NEXT:    lwz 0, -4(31)
+; LE32-NEXT:    mr 1, 31
+; LE32-NEXT:    mr 31, 0
+; LE32-NEXT:    lwz 0, 4(1)
+; LE32-NEXT:    mtlr 0
+; LE32-NEXT:    blr
+; LE32-NEXT:  .LBB0_2:
+; LE32-NEXT:    bl __stack_chk_fail
+  %vla = alloca i32, i64 %t, align 4
+  call void @baz(ptr %vla)
+  ret void
+}
+
+declare void @baz(ptr)
+
+!llvm.module.flags = !{!1}
+!1 = !{i32 2, !"stack-protector-guard", !"global"}