forked from OSchip/llvm-project
144 lines
3.9 KiB
LLVM
144 lines
3.9 KiB
LLVM
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; RUN: llc < %s -mtriple=i686-pc-linux | FileCheck %s
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declare i32 @__gxx_personality_v0(...)
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declare void @good(i32 %a, i32 %b, i32 %c, i32 %d)
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declare void @large(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f)
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declare void @empty()
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; We use an invoke, and expect a .cfi_escape GNU_ARGS_SIZE with size 16
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; before the invocation
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; CHECK-LABEL: test1:
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; CHECK: .cfi_escape 0x2e, 0x10
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; CHECK-NEXT: pushl $4
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; CHECK-NEXT: pushl $3
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; CHECK-NEXT: pushl $2
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; CHECK-NEXT: pushl $1
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; CHECK-NEXT: call
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; CHECK-NEXT: addl $16, %esp
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define void @test1() optsize personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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invoke void @good(i32 1, i32 2, i32 3, i32 4)
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to label %continue unwind label %cleanup
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continue:
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ret void
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cleanup:
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landingpad { i8*, i32 }
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cleanup
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ret void
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}
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; If the function has no handlers, we don't need to generate GNU_ARGS_SIZE,
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; even if it has an unwind table.
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; CHECK-LABEL: test2:
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; CHECK-NOT: .cfi_escape
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; CHECK: pushl $4
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; CHECK-NEXT: pushl $3
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; CHECK-NEXT: pushl $2
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; CHECK-NEXT: pushl $1
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; CHECK-NEXT: call
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; CHECK-NEXT: addl $16, %esp
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define void @test2() optsize personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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call void @good(i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; If we did not end up using any pushes, no need for GNU_ARGS_SIZE anywhere
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; CHECK-LABEL: test3:
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; CHECK-NOT: .cfi_escape
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; CHECK-NOT: pushl
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; CHECK: retl
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define void @test3() optsize personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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invoke void @empty()
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to label %continue unwind label %cleanup
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continue:
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ret void
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cleanup:
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landingpad { i8*, i32 }
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cleanup
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ret void
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}
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; Different sized stacks need different GNU_ARGS_SIZEs
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; CHECK-LABEL: test4:
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; CHECK: .cfi_escape 0x2e, 0x10
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; CHECK-NEXT: pushl $4
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; CHECK-NEXT: pushl $3
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; CHECK-NEXT: pushl $2
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; CHECK-NEXT: pushl $1
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; CHECK-NEXT: call
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; CHECK-NEXT: addl $16, %esp
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; CHECK: .cfi_escape 0x2e, 0x20
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; CHECK-NEXT: subl $8, %esp
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; CHECK-NEXT: pushl $11
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; CHECK-NEXT: pushl $10
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; CHECK-NEXT: pushl $9
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; CHECK-NEXT: pushl $8
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; CHECK-NEXT: pushl $7
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; CHECK-NEXT: pushl $6
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; CHECK-NEXT: calll large
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; CHECK-NEXT: addl $32, %esp
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define void @test4() optsize personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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invoke void @good(i32 1, i32 2, i32 3, i32 4)
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to label %continue1 unwind label %cleanup
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continue1:
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invoke void @large(i32 6, i32 7, i32 8, i32 9, i32 10, i32 11)
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to label %continue2 unwind label %cleanup
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continue2:
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ret void
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cleanup:
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landingpad { i8*, i32 }
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cleanup
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ret void
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}
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; If we did use pushes, we need to reset GNU_ARGS_SIZE before a call
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; without parameters
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; CHECK-LABEL: test5:
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; CHECK: .cfi_escape 0x2e, 0x10
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; CHECK-NEXT: pushl $4
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; CHECK-NEXT: pushl $3
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; CHECK-NEXT: pushl $2
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; CHECK-NEXT: pushl $1
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; CHECK-NEXT: call
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; CHECK-NEXT: addl $16, %esp
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; CHECK: .cfi_escape 0x2e, 0x00
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; CHECK-NEXT: call
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define void @test5() optsize personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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invoke void @good(i32 1, i32 2, i32 3, i32 4)
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to label %continue1 unwind label %cleanup
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continue1:
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invoke void @empty()
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to label %continue2 unwind label %cleanup
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continue2:
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ret void
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cleanup:
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landingpad { i8*, i32 }
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cleanup
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ret void
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}
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; This is actually inefficient - we don't need to repeat the .cfi_escape twice.
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; CHECK-LABEL: test6:
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; CHECK: .cfi_escape 0x2e, 0x10
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; CHECK: call
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; CHECK: .cfi_escape 0x2e, 0x10
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; CHECK: call
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define void @test6() optsize personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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entry:
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invoke void @good(i32 1, i32 2, i32 3, i32 4)
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to label %continue1 unwind label %cleanup
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continue1:
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invoke void @good(i32 5, i32 6, i32 7, i32 8)
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to label %continue2 unwind label %cleanup
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continue2:
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ret void
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cleanup:
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landingpad { i8*, i32 }
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cleanup
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ret void
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}
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