mirror of
https://github.com/c64scene-ar/llvm-6502.git
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32b33c2c30
Summary: The ARM backend can use a loop to implement copying byval parameters before a call. In non-thumb2 mode it uses a constant pool load to materialize the trip count. For targets that need movt instead (e.g. Native Client), use the same code as in thumb2 mode to materialize the trip count. Reviewers: jfb, t.p.northover Differential Revision: http://reviews.llvm.org/D8442 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233324 91177308-0d34-0410-b5e6-96231b3b80d8
147 lines
3.8 KiB
LLVM
147 lines
3.8 KiB
LLVM
; RUN: llc < %s -mtriple=armv7-apple-ios6.0 | FileCheck %s
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; RUN: llc < %s -mtriple=thumbv7-apple-ios6.0 | FileCheck %s -check-prefix=THUMB
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; RUN: llc < %s -mtriple=armv7-unknown-nacl-gnueabi | FileCheck %s -check-prefix=NACL
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; RUN: llc < %s -mtriple=armv5-none-linux-gnueabi | FileCheck %s -check-prefix=NOMOVT
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; NOMOVT-NOT: movt
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; rdar://9877866
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%struct.SmallStruct = type { i32, [8 x i32], [37 x i8] }
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%struct.LargeStruct = type { i32, [1001 x i8], [300 x i32] }
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define i32 @f() nounwind ssp {
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entry:
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; CHECK-LABEL: f:
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; CHECK: ldr
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; CHECK: str
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; CHECK-NOT:bne
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; THUMB-LABEL: f:
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; THUMB: ldr
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; THUMB: str
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; THUMB-NOT:bne
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%st = alloca %struct.SmallStruct, align 4
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%call = call i32 @e1(%struct.SmallStruct* byval %st)
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ret i32 0
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}
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; Generate a loop for large struct byval
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define i32 @g() nounwind ssp {
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entry:
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; CHECK-LABEL: g:
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; CHECK: ldr
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; CHECK: sub
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; CHECK: str
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; CHECK: bne
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; THUMB-LABEL: g:
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; THUMB: ldr
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; THUMB: sub
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; THUMB: str
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; THUMB: bne
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; NACL-LABEL: g:
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; Ensure that use movw instead of constpool for the loop trip count. But don't
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; match the __stack_chk_guard movw
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; NACL: movw r{{[1-9]}}, #
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; NACL: ldr
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; NACL: sub
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; NACL: str
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; NACL: bne
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%st = alloca %struct.LargeStruct, align 4
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%call = call i32 @e2(%struct.LargeStruct* byval %st)
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ret i32 0
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}
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; Generate a loop using NEON instructions
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define i32 @h() nounwind ssp {
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entry:
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; CHECK-LABEL: h:
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; CHECK: vld1
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; CHECK: sub
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; CHECK: vst1
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; CHECK: bne
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; THUMB-LABEL: h:
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; THUMB: vld1
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; THUMB: sub
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; THUMB: vst1
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; THUMB: bne
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; NACL: movw r{{[1-9]}}, #
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; NACL: vld1
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; NACL: sub
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; NACL: vst1
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; NACL: bne
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%st = alloca %struct.LargeStruct, align 16
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%call = call i32 @e3(%struct.LargeStruct* byval align 16 %st)
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ret i32 0
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}
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declare i32 @e1(%struct.SmallStruct* nocapture byval %in) nounwind
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declare i32 @e2(%struct.LargeStruct* nocapture byval %in) nounwind
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declare i32 @e3(%struct.LargeStruct* nocapture byval align 16 %in) nounwind
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; rdar://12442472
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; We can't do tail call since address of s is passed to the callee and part of
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; s is in caller's local frame.
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define void @f3(%struct.SmallStruct* nocapture byval %s) nounwind optsize {
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; CHECK-LABEL: f3
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; CHECK: bl _consumestruct
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; THUMB-LABEL: f3
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; THUMB: blx _consumestruct
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entry:
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%0 = bitcast %struct.SmallStruct* %s to i8*
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tail call void @consumestruct(i8* %0, i32 80) optsize
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ret void
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}
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define void @f4(%struct.SmallStruct* nocapture byval %s) nounwind optsize {
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; CHECK-LABEL: f4
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; CHECK: bl _consumestruct
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; THUMB-LABEL: f4
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; THUMB: blx _consumestruct
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entry:
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%addr = getelementptr inbounds %struct.SmallStruct, %struct.SmallStruct* %s, i32 0, i32 0
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%0 = bitcast i32* %addr to i8*
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tail call void @consumestruct(i8* %0, i32 80) optsize
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ret void
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}
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; We can do tail call here since s is in the incoming argument area.
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define void @f5(i32 %a, i32 %b, i32 %c, i32 %d, %struct.SmallStruct* nocapture byval %s) nounwind optsize {
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; CHECK-LABEL: f5
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; CHECK: b _consumestruct
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; THUMB-LABEL: f5
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; THUMB: b.w _consumestruct
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entry:
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%0 = bitcast %struct.SmallStruct* %s to i8*
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tail call void @consumestruct(i8* %0, i32 80) optsize
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ret void
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}
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define void @f6(i32 %a, i32 %b, i32 %c, i32 %d, %struct.SmallStruct* nocapture byval %s) nounwind optsize {
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; CHECK-LABEL: f6
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; CHECK: b _consumestruct
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; THUMB-LABEL: f6
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; THUMB: b.w _consumestruct
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entry:
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%addr = getelementptr inbounds %struct.SmallStruct, %struct.SmallStruct* %s, i32 0, i32 0
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%0 = bitcast i32* %addr to i8*
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tail call void @consumestruct(i8* %0, i32 80) optsize
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ret void
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}
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declare void @consumestruct(i8* nocapture %structp, i32 %structsize) nounwind
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; PR17309
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%struct.I.8 = type { [10 x i32], [3 x i8] }
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declare void @use_I(%struct.I.8* byval)
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define void @test_I_16() {
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; CHECK-LABEL: test_I_16
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; CHECK: ldrb
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; CHECK: strb
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; THUMB-LABEL: test_I_16
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; THUMB: ldrb
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; THUMB: strb
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entry:
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call void @use_I(%struct.I.8* byval align 16 undef)
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ret void
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}
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