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3add36fb90
Third time's the charm? The previous attempt (r265345) caused ASan test failures on X86, as broken CFI caused stack traces to not work. This version of the patch makes sure not to merge with stack adjustments that have CFI, and to not add merged instructions' offests to the CFI about to be generated. This is already covered by the lit tests; I just got the expectations wrong previously. llvm-svn: 265623
305 lines
8.5 KiB
LLVM
305 lines
8.5 KiB
LLVM
; RUN: llc < %s -mtriple=i686-pc-linux | FileCheck %s -check-prefix=LINUX -check-prefix=CHECK
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; RUN: llc < %s -mtriple=i686-apple-darwin | FileCheck %s -check-prefix=DARWIN -check-prefix=CHECK
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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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; When we use an invoke, we expect a .cfi_escape GNU_ARGS_SIZE
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; with size 16 before the invocation. Without FP, we also expect
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; .cfi_adjust_cfa_offset after each push.
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; Darwin should not generate pushes in either circumstance.
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; CHECK-LABEL: test1_nofp:
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; LINUX: .cfi_escape 0x2e, 0x10
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; LINUX-NEXT: pushl $4
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $3
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $2
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $1
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: call
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; LINUX-NEXT: addl $16, %esp
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; LINUX: .cfi_adjust_cfa_offset -16
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; DARWIN-NOT: .cfi_escape
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; DARWIN-NOT: pushl
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define void @test1_nofp() #0 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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; CHECK-LABEL: test1_fp:
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; LINUX: .cfi_escape 0x2e, 0x10
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; LINUX-NEXT: pushl $4
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; LINUX-NEXT: pushl $3
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; LINUX-NEXT: pushl $2
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; LINUX-NEXT: pushl $1
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; LINUX-NEXT: call
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; LINUX-NEXT: addl $16, %esp
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; DARWIN: pushl %ebp
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; DARWIN-NOT: .cfi_escape
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; DARWIN-NOT: pushl
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define void @test1_fp() #1 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. Without FP, we still need cfi_adjust_cfa_offset,
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; so darwin should not generate pushes.
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; CHECK-LABEL: test2_nofp:
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; LINUX-NOT: .cfi_escape
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; LINUX: pushl $4
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $3
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $2
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $1
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: call
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; LINUX-NEXT: addl $28, %esp
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; LINUX: .cfi_adjust_cfa_offset -16
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; DARWIN-NOT: .cfi_escape
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; DARWIN-NOT: pushl
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define void @test2_nofp() #0 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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; CHECK-LABEL: test2_fp:
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; CHECK-NOT: .cfi_escape
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; CHECK-NOT: .cfi_adjust_cfa_offset
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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 $24, %esp
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define void @test2_fp() #1 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 or
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; cfi_adjust_cfa_offset.
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; CHECK-LABEL: test3_nofp:
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; LINUX-NOT: .cfi_escape
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; LINUX-NOT: .cfi_adjust_cfa_offset
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; LINUX-NOT: pushl
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; LINUX: retl
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define void @test3_nofp() #0 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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; If we did not end up using any pushes, no need for GNU_ARGS_SIZE or
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; cfi_adjust_cfa_offset.
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; CHECK-LABEL: test3_fp:
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; LINUX: pushl %ebp
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; LINUX-NOT: .cfi_escape
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; LINUX-NOT: .cfi_adjust_cfa_offset
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; LINUX-NOT: pushl
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; LINUX: retl
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define void @test3_fp() #1 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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; LINUX: .cfi_escape 0x2e, 0x10
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; LINUX-NEXT: pushl $4
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; LINUX-NEXT: pushl $3
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; LINUX-NEXT: pushl $2
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; LINUX-NEXT: pushl $1
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; LINUX-NEXT: call
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; LINUX-NEXT: addl $16, %esp
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; LINUX: .cfi_escape 0x2e, 0x20
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; LINUX: subl $8, %esp
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; LINUX-NEXT: pushl $11
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; LINUX-NEXT: pushl $10
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; LINUX-NEXT: pushl $9
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; LINUX-NEXT: pushl $8
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; LINUX-NEXT: pushl $7
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; LINUX-NEXT: pushl $6
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; LINUX-NEXT: calll large
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; LINUX-NEXT: addl $32, %esp
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define void @test4() #1 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, but don't need to adjust the cfa offset
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; CHECK-LABEL: test5_nofp:
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; LINUX: .cfi_escape 0x2e, 0x10
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; LINUX-NEXT: pushl $4
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $3
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $2
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: pushl $1
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; LINUX-NEXT: Ltmp{{[0-9]+}}:
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; LINUX-NEXT: .cfi_adjust_cfa_offset 4
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; LINUX-NEXT: call
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; LINUX-NEXT: addl $16, %esp
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; LINUX: .cfi_adjust_cfa_offset -16
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; LINUX-NOT: .cfi_adjust_cfa_offset
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; LINUX: .cfi_escape 0x2e, 0x00
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; LINUX-NOT: .cfi_adjust_cfa_offset
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; LINUX: call
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define void @test5_nofp() #0 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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; CHECK-LABEL: test5_fp:
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; LINUX: .cfi_escape 0x2e, 0x10
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; LINUX-NEXT: pushl $4
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; LINUX-NEXT: pushl $3
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; LINUX-NEXT: pushl $2
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; LINUX-NEXT: pushl $1
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; LINUX-NEXT: call
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; LINUX-NEXT: addl $16, %esp
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; LINUX: .cfi_escape 0x2e, 0x00
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; LINUX-NOT: .cfi_adjust_cfa_offset
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; LINUX: call
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define void @test5_fp() #1 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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; FIXME: 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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; LINUX: .cfi_escape 0x2e, 0x10
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; LINUX: call
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; LINUX: .cfi_escape 0x2e, 0x10
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; LINUX: call
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define void @test6() #1 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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; Darwin should generate pushes in the presense of FP and an unwind table,
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; but not FP and invoke.
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; CHECK-LABEL: test7:
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; DARWIN: pushl %ebp
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; DARWIN: movl %esp, %ebp
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; DARWIN: .cfi_def_cfa_register %ebp
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; DARWIN-NOT: .cfi_adjust_cfa_offset
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; DARWIN: pushl $4
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; DARWIN-NEXT: pushl $3
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; DARWIN-NEXT: pushl $2
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; DARWIN-NEXT: pushl $1
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; DARWIN-NEXT: call
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define void @test7() #1 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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; CHECK-LABEL: test8:
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; DARWIN: pushl %ebp
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; DARWIN: movl %esp, %ebp
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; DARWIN-NOT: .cfi_adjust_cfa_offset
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; DARWIN-NOT: pushl
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define void @test8() #1 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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attributes #0 = { optsize }
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attributes #1 = { optsize "no-frame-pointer-elim"="true" }
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