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return values are bitcasts. The chain had previously been being clobbered with the entry node to the dag, which sometimes caused other code in the function to be erroneously deleted when tailcall optimization kicked in. <rdar://problem/13827621> llvm-svn: 181696
182 lines
4.8 KiB
LLVM
182 lines
4.8 KiB
LLVM
; RUN: llc < %s -mtriple=armv6-apple-ios -mattr=+vfp2 -arm-tail-calls | FileCheck %s -check-prefix=CHECKV6
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; RUN: llc < %s -mtriple=armv6-linux-gnueabi -relocation-model=pic -mattr=+vfp2 -arm-tail-calls | FileCheck %s -check-prefix=CHECKELF
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; RUN: llc < %s -mtriple=thumbv7-apple-ios -arm-tail-calls | FileCheck %s -check-prefix=CHECKT2D
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; RUN: llc < %s -mtriple=thumbv7-apple-ios5.0 | FileCheck %s -check-prefix=CHECKT2D
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; Enable tailcall optimization for iOS 5.0
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; rdar://9120031
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@t = weak global i32 ()* null ; <i32 ()**> [#uses=1]
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declare void @g(i32, i32, i32, i32)
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define void @t1() {
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; CHECKELF: t1:
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; CHECKELF: bl g(PLT)
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call void @g( i32 1, i32 2, i32 3, i32 4 )
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ret void
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}
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define void @t2() {
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; CHECKV6: t2:
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; CHECKV6: bx r0
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; CHECKT2D: t2:
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; CHECKT2D: ldr
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; CHECKT2D-NEXT: ldr
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; CHECKT2D-NEXT: bx r0
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%tmp = load i32 ()** @t ; <i32 ()*> [#uses=1]
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%tmp.upgrd.2 = tail call i32 %tmp( ) ; <i32> [#uses=0]
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ret void
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}
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define void @t3() {
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; CHECKV6: t3:
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; CHECKV6: b _t2
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; CHECKELF: t3:
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; CHECKELF: b t2(PLT)
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; CHECKT2D: t3:
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; CHECKT2D: b.w _t2
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tail call void @t2( ) ; <i32> [#uses=0]
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ret void
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}
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; Sibcall optimization of expanded libcalls. rdar://8707777
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define double @t4(double %a) nounwind readonly ssp {
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entry:
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; CHECKV6: t4:
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; CHECKV6: b _sin
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; CHECKELF: t4:
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; CHECKELF: b sin(PLT)
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%0 = tail call double @sin(double %a) nounwind readonly ; <double> [#uses=1]
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ret double %0
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}
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define float @t5(float %a) nounwind readonly ssp {
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entry:
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; CHECKV6: t5:
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; CHECKV6: b _sinf
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; CHECKELF: t5:
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; CHECKELF: b sinf(PLT)
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%0 = tail call float @sinf(float %a) nounwind readonly ; <float> [#uses=1]
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ret float %0
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}
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declare float @sinf(float) nounwind readonly
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declare double @sin(double) nounwind readonly
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define i32 @t6(i32 %a, i32 %b) nounwind readnone {
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entry:
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; CHECKV6: t6:
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; CHECKV6: b ___divsi3
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; CHECKELF: t6:
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; CHECKELF: b __aeabi_idiv(PLT)
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%0 = sdiv i32 %a, %b
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ret i32 %0
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}
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; Make sure the tail call instruction isn't deleted
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; rdar://8309338
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declare void @foo() nounwind
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define void @t7() nounwind {
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entry:
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; CHECKT2D: t7:
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; CHECKT2D: blxeq _foo
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; CHECKT2D-NEXT: pop.w
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; CHECKT2D-NEXT: b.w _foo
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br i1 undef, label %bb, label %bb1.lr.ph
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bb1.lr.ph:
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tail call void @foo() nounwind
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unreachable
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bb:
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tail call void @foo() nounwind
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ret void
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}
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; Make sure codegenprep is duplicating ret instructions to enable tail calls.
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; rdar://11140249
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define i32 @t8(i32 %x) nounwind ssp {
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entry:
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; CHECKT2D: t8:
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; CHECKT2D-NOT: push
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%and = and i32 %x, 1
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%tobool = icmp eq i32 %and, 0
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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; CHECKT2D: bne.w _a
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%call = tail call i32 @a(i32 %x) nounwind
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br label %return
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if.end: ; preds = %entry
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%and1 = and i32 %x, 2
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%tobool2 = icmp eq i32 %and1, 0
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br i1 %tobool2, label %if.end5, label %if.then3
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if.then3: ; preds = %if.end
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; CHECKT2D: bne.w _b
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%call4 = tail call i32 @b(i32 %x) nounwind
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br label %return
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if.end5: ; preds = %if.end
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; CHECKT2D: b.w _c
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%call6 = tail call i32 @c(i32 %x) nounwind
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br label %return
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return: ; preds = %if.end5, %if.then3, %if.then
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%retval.0 = phi i32 [ %call, %if.then ], [ %call4, %if.then3 ], [ %call6, %if.end5 ]
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ret i32 %retval.0
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}
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declare i32 @a(i32)
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declare i32 @b(i32)
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declare i32 @c(i32)
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; PR12419
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; rdar://11195178
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; Use the correct input chain for the tailcall node or else the call to
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; _ZN9MutexLockD1Ev would be lost.
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%class.MutexLock = type { i8 }
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@x = external global i32, align 4
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define i32 @t9() nounwind {
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; CHECKT2D: t9:
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; CHECKT2D: blx __ZN9MutexLockC1Ev
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; CHECKT2D: blx __ZN9MutexLockD1Ev
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; CHECKT2D: b.w ___divsi3
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%lock = alloca %class.MutexLock, align 1
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%1 = call %class.MutexLock* @_ZN9MutexLockC1Ev(%class.MutexLock* %lock)
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%2 = load i32* @x, align 4
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%3 = sdiv i32 1000, %2
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%4 = call %class.MutexLock* @_ZN9MutexLockD1Ev(%class.MutexLock* %lock)
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ret i32 %3
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}
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declare %class.MutexLock* @_ZN9MutexLockC1Ev(%class.MutexLock*) unnamed_addr nounwind align 2
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declare %class.MutexLock* @_ZN9MutexLockD1Ev(%class.MutexLock*) unnamed_addr nounwind align 2
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; rdar://13827621
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; Correctly preserve the input chain for the tailcall node in the bitcast case,
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; otherwise the call to floorf is lost.
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define float @libcall_tc_test2(float* nocapture %a, float %b) {
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; CHECKT2D: libcall_tc_test2:
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; CHECKT2D: blx _floorf
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; CHECKT2D: b.w _truncf
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%1 = load float* %a, align 4
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%call = tail call float @floorf(float %1)
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store float %call, float* %a, align 4
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%call1 = tail call float @truncf(float %b)
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ret float %call1
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}
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declare float @floorf(float) readnone
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declare float @truncf(float) readnone
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