1354a03e74
Tail Calls were initially disabled for PC Relative code because it was not safe to make certain assumptions about the tail calls (namely that all compiled functions no longer used the TOC pointer in R2). However, once all of the TOC pointer references have been removed it is safe to tail call everything that was tail called prior to the PC relative additions as well as a number of new cases. For example, it is now possible to tail call indirect functions as there is no need to save and restore the TOC pointer for indirect functions if the caller is marked as may clobber R2 (st_other=1). For the same reason it is now also possible to tail call functions that are external. Differential Revision: https://reviews.llvm.org/D77788
245 lines
7.2 KiB
LLVM
245 lines
7.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu \
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; RUN: -mcpu=future -enable-ppc-quad-precision -ppc-asm-full-reg-names \
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; RUN: -ppc-vsr-nums-as-vr < %s | FileCheck %s
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%struct.Struct = type { i8, i16, i32 }
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@valChar = external local_unnamed_addr global i8, align 1
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@valShort = external local_unnamed_addr global i16, align 2
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@valInt = external global i32, align 4
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@valUnsigned = external local_unnamed_addr global i32, align 4
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@valLong = external local_unnamed_addr global i64, align 8
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@ptr = external local_unnamed_addr global i32*, align 8
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@array = external local_unnamed_addr global [10 x i32], align 4
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@structure = external local_unnamed_addr global %struct.Struct, align 4
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@ptrfunc = external local_unnamed_addr global void (...)*, align 8
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define dso_local signext i32 @ReadGlobalVarChar() local_unnamed_addr {
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; CHECK-LABEL: ReadGlobalVarChar:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valChar@got@pcrel(0), 1
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; CHECK-NEXT: lbz r3, 0(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i8, i8* @valChar, align 1
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%conv = zext i8 %0 to i32
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ret i32 %conv
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}
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define dso_local void @WriteGlobalVarChar() local_unnamed_addr {
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; CHECK-LABEL: WriteGlobalVarChar:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valChar@got@pcrel(0), 1
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; CHECK-NEXT: li r4, 3
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; CHECK-NEXT: stb r4, 0(r3)
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; CHECK-NEXT: blr
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entry:
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store i8 3, i8* @valChar, align 1
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ret void
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}
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define dso_local signext i32 @ReadGlobalVarShort() local_unnamed_addr {
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; CHECK-LABEL: ReadGlobalVarShort:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valShort@got@pcrel(0), 1
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; CHECK-NEXT: lha r3, 0(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i16, i16* @valShort, align 2
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%conv = sext i16 %0 to i32
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ret i32 %conv
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}
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define dso_local void @WriteGlobalVarShort() local_unnamed_addr {
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; CHECK-LABEL: WriteGlobalVarShort:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valShort@got@pcrel(0), 1
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; CHECK-NEXT: li r4, 3
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; CHECK-NEXT: sth r4, 0(r3)
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; CHECK-NEXT: blr
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entry:
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store i16 3, i16* @valShort, align 2
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ret void
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}
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define dso_local signext i32 @ReadGlobalVarInt() local_unnamed_addr {
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; CHECK-LABEL: ReadGlobalVarInt:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valInt@got@pcrel(0), 1
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; CHECK-NEXT: lwa r3, 0(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i32, i32* @valInt, align 4
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ret i32 %0
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}
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define dso_local void @WriteGlobalVarInt() local_unnamed_addr {
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; CHECK-LABEL: WriteGlobalVarInt:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valInt@got@pcrel(0), 1
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; CHECK-NEXT: li r4, 33
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; CHECK-NEXT: stw r4, 0(r3)
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; CHECK-NEXT: blr
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entry:
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store i32 33, i32* @valInt, align 4
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ret void
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}
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define dso_local signext i32 @ReadGlobalVarUnsigned() local_unnamed_addr {
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; CHECK-LABEL: ReadGlobalVarUnsigned:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valUnsigned@got@pcrel(0), 1
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; CHECK-NEXT: lwa r3, 0(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i32, i32* @valUnsigned, align 4
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ret i32 %0
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}
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define dso_local void @WriteGlobalVarUnsigned() local_unnamed_addr {
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; CHECK-LABEL: WriteGlobalVarUnsigned:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valUnsigned@got@pcrel(0), 1
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; CHECK-NEXT: li r4, 33
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; CHECK-NEXT: stw r4, 0(r3)
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; CHECK-NEXT: blr
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entry:
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store i32 33, i32* @valUnsigned, align 4
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ret void
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}
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define dso_local signext i32 @ReadGlobalVarLong() local_unnamed_addr {
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; CHECK-LABEL: ReadGlobalVarLong:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valLong@got@pcrel(0), 1
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; CHECK-NEXT: lwa r3, 0(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i64, i64* @valLong, align 8
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%conv = trunc i64 %0 to i32
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ret i32 %conv
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}
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define dso_local void @WriteGlobalVarLong() local_unnamed_addr {
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; CHECK-LABEL: WriteGlobalVarLong:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valLong@got@pcrel(0), 1
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; CHECK-NEXT: li r4, 3333
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; CHECK-NEXT: std r4, 0(r3)
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; CHECK-NEXT: blr
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entry:
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store i64 3333, i64* @valLong, align 8
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ret void
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}
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define dso_local i32* @ReadGlobalPtr() local_unnamed_addr {
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; CHECK-LABEL: ReadGlobalPtr:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, ptr@got@pcrel(0), 1
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; CHECK-NEXT: ld r3, 0(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i32*, i32** @ptr, align 8
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ret i32* %0
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}
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define dso_local void @WriteGlobalPtr() local_unnamed_addr {
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; CHECK-LABEL: WriteGlobalPtr:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, ptr@got@pcrel(0), 1
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; CHECK-NEXT: li r4, 3
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; CHECK-NEXT: ld r3, 0(r3)
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; CHECK-NEXT: stw r4, 0(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i32*, i32** @ptr, align 8
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store i32 3, i32* %0, align 4
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ret void
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}
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define dso_local nonnull i32* @GlobalVarAddr() local_unnamed_addr {
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; CHECK-LABEL: GlobalVarAddr:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, valInt@got@pcrel(0), 1
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; CHECK-NEXT: blr
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entry:
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ret i32* @valInt
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}
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define dso_local signext i32 @ReadGlobalArray() local_unnamed_addr {
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; CHECK-LABEL: ReadGlobalArray:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, array@got@pcrel(0), 1
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; CHECK-NEXT: lwa r3, 12(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i32, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @array, i64 0, i64 3), align 4
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ret i32 %0
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}
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define dso_local void @WriteGlobalArray() local_unnamed_addr {
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; CHECK-LABEL: WriteGlobalArray:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, array@got@pcrel(0), 1
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; CHECK-NEXT: li r4, 5
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; CHECK-NEXT: stw r4, 12(r3)
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; CHECK-NEXT: blr
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entry:
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store i32 5, i32* getelementptr inbounds ([10 x i32], [10 x i32]* @array, i64 0, i64 3), align 4
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ret void
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}
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define dso_local signext i32 @ReadGlobalStruct() local_unnamed_addr {
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; CHECK-LABEL: ReadGlobalStruct:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, structure@got@pcrel(0), 1
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; CHECK-NEXT: lwa r3, 4(r3)
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; CHECK-NEXT: blr
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entry:
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%0 = load i32, i32* getelementptr inbounds (%struct.Struct, %struct.Struct* @structure, i64 0, i32 2), align 4
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ret i32 %0
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}
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define dso_local void @WriteGlobalStruct() local_unnamed_addr {
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; CHECK-LABEL: WriteGlobalStruct:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, structure@got@pcrel(0), 1
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; CHECK-NEXT: li r4, 3
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; CHECK-NEXT: stw r4, 4(r3)
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; CHECK-NEXT: blr
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entry:
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store i32 3, i32* getelementptr inbounds (%struct.Struct, %struct.Struct* @structure, i64 0, i32 2), align 4
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ret void
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}
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define dso_local void @ReadFuncPtr() local_unnamed_addr {
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; CHECK-LABEL: ReadFuncPtr:
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; CHECK: .localentry ReadFuncPtr, 1
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; CHECK-NEXT: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, ptrfunc@got@pcrel(0), 1
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; CHECK-NEXT: ld r12, 0(r3)
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; CHECK-NEXT: mtctr r12
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; CHECK-NEXT: bctr
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; CHECK-NEXT: #TC_RETURNr8 ctr 0
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entry:
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%0 = load void ()*, void ()** bitcast (void (...)** @ptrfunc to void ()**), align 8
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tail call void %0()
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ret void
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}
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define dso_local void @WriteFuncPtr() local_unnamed_addr {
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; CHECK-LABEL: WriteFuncPtr:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pld r3, ptrfunc@got@pcrel(0), 1
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; CHECK-NEXT: pld r4, function@got@pcrel(0), 1
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; CHECK-NEXT: std r4, 0(r3)
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; CHECK-NEXT: blr
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entry:
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store void (...)* @function, void (...)** @ptrfunc, align 8
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ret void
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}
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declare void @function(...)
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