a1710eb3cd
The LIT test cases were migrated with the script provided by Nikita Popov. No manual changes were made. Committed without review since no functional changes, after consultation with uweigand.
264 lines
7.9 KiB
LLVM
264 lines
7.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 -O3 -verify-machineinstrs | FileCheck %s
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;
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; Test stack clash protection probing for static allocas.
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; Small: one probe.
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define i32 @fun0() #0 {
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; CHECK-LABEL: fun0:
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; CHECK: # %bb.0:
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; CHECK-NEXT: aghi %r15, -560
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; CHECK-NEXT: .cfi_def_cfa_offset 720
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; CHECK-NEXT: cg %r0, 552(%r15)
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; CHECK-NEXT: mvhi 552(%r15), 1
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; CHECK-NEXT: l %r2, 160(%r15)
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; CHECK-NEXT: aghi %r15, 560
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; CHECK-NEXT: br %r14
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%a = alloca i32, i64 100
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%b = getelementptr inbounds i32, ptr %a, i64 98
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store volatile i32 1, ptr %b
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%c = load volatile i32, ptr %a
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ret i32 %c
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}
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; Medium: two probes.
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define i32 @fun1() #0 {
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; CHECK-LABEL: fun1:
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; CHECK: # %bb.0:
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; CHECK-NEXT: aghi %r15, -4096
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; CHECK-NEXT: .cfi_def_cfa_offset 4256
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; CHECK-NEXT: cg %r0, 4088(%r15)
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; CHECK-NEXT: aghi %r15, -4080
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; CHECK-NEXT: .cfi_def_cfa_offset 8336
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; CHECK-NEXT: cg %r0, 4072(%r15)
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; CHECK-NEXT: mvhi 976(%r15), 1
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; CHECK-NEXT: l %r2, 176(%r15)
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; CHECK-NEXT: aghi %r15, 8176
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; CHECK-NEXT: br %r14
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%a = alloca i32, i64 2000
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%b = getelementptr inbounds i32, ptr %a, i64 200
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store volatile i32 1, ptr %b
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%c = load volatile i32, ptr %a
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ret i32 %c
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}
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; Large: Use a loop to allocate and probe in steps.
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define i32 @fun2() #0 {
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; CHECK-LABEL: fun2:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lgr %r0, %r15
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; CHECK-NEXT: .cfi_def_cfa_register %r0
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; CHECK-NEXT: agfi %r0, -69632
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; CHECK-NEXT: .cfi_def_cfa_offset 69792
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; CHECK-NEXT: .LBB2_1: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: aghi %r15, -4096
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; CHECK-NEXT: cg %r0, 4088(%r15)
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; CHECK-NEXT: clgrjh %r15, %r0, .LBB2_1
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; CHECK-NEXT: # %bb.2:
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; CHECK-NEXT: .cfi_def_cfa_register %r15
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; CHECK-NEXT: aghi %r15, -2544
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; CHECK-NEXT: .cfi_def_cfa_offset 72336
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; CHECK-NEXT: cg %r0, 2536(%r15)
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; CHECK-NEXT: lhi %r0, 1
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; CHECK-NEXT: mvhi 568(%r15), 1
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; CHECK-NEXT: sty %r0, 28968(%r15)
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; CHECK-NEXT: l %r2, 176(%r15)
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; CHECK-NEXT: agfi %r15, 72176
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; CHECK-NEXT: br %r14
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%a = alloca i32, i64 18000
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%b0 = getelementptr inbounds i32, ptr %a, i64 98
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%b1 = getelementptr inbounds i32, ptr %a, i64 7198
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store volatile i32 1, ptr %b0
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store volatile i32 1, ptr %b1
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%c = load volatile i32, ptr %a
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ret i32 %c
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}
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; Ends evenly on the step so no remainder needed.
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define void @fun3() #0 {
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; CHECK-LABEL: fun3:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: lgr %r0, %r15
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; CHECK-NEXT: .cfi_def_cfa_register %r0
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; CHECK-NEXT: aghi %r0, -28672
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; CHECK-NEXT: .cfi_def_cfa_offset 28832
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; CHECK-NEXT: .LBB3_1: # %entry
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: aghi %r15, -4096
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; CHECK-NEXT: cg %r0, 4088(%r15)
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; CHECK-NEXT: clgrjh %r15, %r0, .LBB3_1
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; CHECK-NEXT: # %bb.2: # %entry
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; CHECK-NEXT: .cfi_def_cfa_register %r15
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; CHECK-NEXT: mvhi 180(%r15), 0
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; CHECK-NEXT: l %r0, 180(%r15)
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; CHECK-NEXT: aghi %r15, 28672
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; CHECK-NEXT: br %r14
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entry:
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%stack = alloca [7122 x i32], align 4
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%i = alloca i32, align 4
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store volatile i32 0, ptr %i, align 4
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%i.0.i.0.6 = load volatile i32, ptr %i, align 4
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ret void
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}
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; Loop with bigger step.
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define void @fun4() #0 "stack-probe-size"="8192" {
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; CHECK-LABEL: fun4:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: lgr %r0, %r15
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; CHECK-NEXT: .cfi_def_cfa_register %r0
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; CHECK-NEXT: aghi %r0, -24576
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; CHECK-NEXT: .cfi_def_cfa_offset 24736
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; CHECK-NEXT: .LBB4_1: # %entry
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: aghi %r15, -8192
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; CHECK-NEXT: cg %r0, 8184(%r15)
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; CHECK-NEXT: clgrjh %r15, %r0, .LBB4_1
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; CHECK-NEXT: # %bb.2: # %entry
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; CHECK-NEXT: .cfi_def_cfa_register %r15
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; CHECK-NEXT: aghi %r15, -7608
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; CHECK-NEXT: .cfi_def_cfa_offset 32344
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; CHECK-NEXT: cg %r0, 7600(%r15)
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; CHECK-NEXT: mvhi 180(%r15), 0
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; CHECK-NEXT: l %r0, 180(%r15)
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; CHECK-NEXT: aghi %r15, 32184
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; CHECK-NEXT: br %r14
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entry:
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%stack = alloca [8000 x i32], align 4
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%i = alloca i32, align 4
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store volatile i32 0, ptr %i, align 4
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%i.0.i.0.6 = load volatile i32, ptr %i, align 4
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ret void
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}
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; Probe size should be modulo stack alignment.
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define void @fun5() #0 "stack-probe-size"="4100" {
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; CHECK-LABEL: fun5:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: aghi %r15, -4096
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; CHECK-NEXT: .cfi_def_cfa_offset 4256
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; CHECK-NEXT: cg %r0, 4088(%r15)
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; CHECK-NEXT: aghi %r15, -88
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; CHECK-NEXT: .cfi_def_cfa_offset 4344
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; CHECK-NEXT: cg %r0, 80(%r15)
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; CHECK-NEXT: mvhi 180(%r15), 0
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; CHECK-NEXT: l %r0, 180(%r15)
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; CHECK-NEXT: aghi %r15, 4184
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; CHECK-NEXT: br %r14
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entry:
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%stack = alloca [1000 x i32], align 4
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%i = alloca i32, align 4
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store volatile i32 0, ptr %i, align 4
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%i.0.i.0.6 = load volatile i32, ptr %i, align 4
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ret void
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}
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; The minimum probe size is the stack alignment.
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define void @fun6() #0 "stack-probe-size"="5" {
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; CHECK-LABEL: fun6:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: lgr %r0, %r15
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; CHECK-NEXT: .cfi_def_cfa_register %r0
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; CHECK-NEXT: aghi %r0, -4184
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; CHECK-NEXT: .cfi_def_cfa_offset 4344
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; CHECK-NEXT: .LBB6_1: # %entry
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: aghi %r15, -8
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; CHECK-NEXT: cg %r0, 0(%r15)
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; CHECK-NEXT: clgrjh %r15, %r0, .LBB6_1
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; CHECK-NEXT: # %bb.2: # %entry
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; CHECK-NEXT: .cfi_def_cfa_register %r15
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; CHECK-NEXT: mvhi 180(%r15), 0
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; CHECK-NEXT: l %r0, 180(%r15)
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; CHECK-NEXT: aghi %r15, 4184
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; CHECK-NEXT: br %r14
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entry:
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%stack = alloca [1000 x i32], align 4
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%i = alloca i32, align 4
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store volatile i32 0, ptr %i, align 4
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%i.0.i.0.6 = load volatile i32, ptr %i, align 4
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ret void
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}
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; Small with a natural probe (STMG) - needs no extra probe.
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define i32 @fun7() #0 {
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; CHECK-LABEL: fun7:
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; CHECK: # %bb.0:
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; CHECK-NEXT: stmg %r14, %r15, 112(%r15)
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; CHECK-NEXT: .cfi_offset %r14, -48
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; CHECK-NEXT: .cfi_offset %r15, -40
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; CHECK-NEXT: aghi %r15, -3976
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; CHECK-NEXT: .cfi_def_cfa_offset 4136
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; CHECK-NEXT: brasl %r14, foo@PLT
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; CHECK-NEXT: st %r2, 568(%r15)
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; CHECK-NEXT: l %r2, 176(%r15)
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; CHECK-NEXT: lmg %r14, %r15, 4088(%r15)
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; CHECK-NEXT: br %r14
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%v = call i32 @foo()
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%a = alloca i32, i64 950
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%b = getelementptr inbounds i32, ptr %a, i64 98
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store volatile i32 %v, ptr %b
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%c = load volatile i32, ptr %a
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ret i32 %c
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}
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; Medium with an STMG - still needs probing.
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define i32 @fun8() #0 {
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; CHECK-LABEL: fun8:
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; CHECK: # %bb.0:
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; CHECK-NEXT: stmg %r14, %r15, 112(%r15)
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; CHECK-NEXT: .cfi_offset %r14, -48
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; CHECK-NEXT: .cfi_offset %r15, -40
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; CHECK-NEXT: aghi %r15, -3984
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; CHECK-NEXT: .cfi_def_cfa_offset 4144
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; CHECK-NEXT: cg %r0, 3976(%r15)
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; CHECK-NEXT: brasl %r14, foo@PLT
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; CHECK-NEXT: st %r2, 976(%r15)
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; CHECK-NEXT: l %r2, 176(%r15)
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; CHECK-NEXT: lmg %r14, %r15, 4096(%r15)
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; CHECK-NEXT: br %r14
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%v = call i32 @foo()
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%a = alloca i32, i64 952
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%b = getelementptr inbounds i32, ptr %a, i64 200
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store volatile i32 %v, ptr %b
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%c = load volatile i32, ptr %a
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ret i32 %c
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}
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define void @fun9() #0 "backchain" {
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; CHECK-LABEL: fun9:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: lgr %r1, %r15
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; CHECK-NEXT: lgr %r0, %r15
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; CHECK-NEXT: .cfi_def_cfa_register %r0
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; CHECK-NEXT: aghi %r0, -28672
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; CHECK-NEXT: .cfi_def_cfa_offset 28832
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; CHECK-NEXT: .LBB9_1: # %entry
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: aghi %r15, -4096
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; CHECK-NEXT: cg %r0, 4088(%r15)
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; CHECK-NEXT: clgrjh %r15, %r0, .LBB9_1
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; CHECK-NEXT: # %bb.2: # %entry
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; CHECK-NEXT: .cfi_def_cfa_register %r15
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; CHECK-NEXT: stg %r1, 0(%r15)
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; CHECK-NEXT: mvhi 180(%r15), 0
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; CHECK-NEXT: l %r0, 180(%r15)
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; CHECK-NEXT: aghi %r15, 28672
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; CHECK-NEXT: br %r14
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entry:
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%stack = alloca [7122 x i32], align 4
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%i = alloca i32, align 4
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store volatile i32 0, ptr %i, align 4
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%i.0.i.0.6 = load volatile i32, ptr %i, align 4
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ret void
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}
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declare i32 @foo()
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attributes #0 = { "probe-stack"="inline-asm" }
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