78 lines
1.6 KiB
LLVM
78 lines
1.6 KiB
LLVM
; This test is attempting to detect that the compiler correctly generates stack
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; probe calls when the size of the local variables exceeds the specified stack
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; probe size.
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;
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; Testing the default value of 4096 bytes makes sense, because the default
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; stack probe size equals the page size (4096 bytes for all x86 targets), and
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; this is unlikely to change in the future.
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;
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; RUN: llc -mtriple=i686-windows-msvc < %s | FileCheck %s
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target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
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define i32 @test1() "stack-probe-size"="0" {
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%buffer = alloca [4095 x i8]
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ret i32 0
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; CHECK-LABEL: _test1:
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; CHECK-NOT: subl $4095, %esp
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; CHECK: movl $4095, %eax
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; CHECK: calll __chkstk
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}
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define i32 @test2() {
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%buffer = alloca [4095 x i8]
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ret i32 0
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; CHECK-LABEL: _test2:
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; CHECK-NOT: movl $4095, %eax
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; CHECK: subl $4095, %esp
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; CHECK-NOT: calll __chkstk
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}
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define i32 @test3() "stack-probe-size"="8192" {
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%buffer = alloca [4095 x i8]
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ret i32 0
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; CHECK-LABEL: _test3:
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; CHECK-NOT: movl $4095, %eax
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; CHECK: subl $4095, %esp
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; CHECK-NOT: calll __chkstk
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}
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define i32 @test4() "stack-probe-size"="0" {
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%buffer = alloca [4096 x i8]
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ret i32 0
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; CHECK-LABEL: _test4:
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; CHECK-NOT: subl $4096, %esp
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; CHECK: movl $4096, %eax
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; CHECK: calll __chkstk
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}
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define i32 @test5() {
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%buffer = alloca [4096 x i8]
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ret i32 0
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; CHECK-LABEL: _test5:
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; CHECK-NOT: subl $4096, %esp
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; CHECK: movl $4096, %eax
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; CHECK: calll __chkstk
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}
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define i32 @test6() "stack-probe-size"="8192" {
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%buffer = alloca [4096 x i8]
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ret i32 0
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; CGECK-LABEL: _test6:
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; CGECK-NOT: movl $4096, %eax
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; CGECK: subl $4096, %esp
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; CGECK-NOT: calll __chkstk
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}
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