llvm-mirror/test/CodeGen/ARM/2012-10-04-FixedFrame-vs-byval.ll

; RUN: llc < %s -mtriple=armv7-none-linux-gnueabi | FileCheck %s

@.str = private unnamed_addr constant [12 x i8] c"val.a = %f\0A\00"
%struct_t = type { double, double, double }
@static_val = constant %struct_t { double 1.0, double 2.0, double 3.0 }

declare i32 @printf(i8*, ...)

; CHECK-LABEL:     test_byval_usage_scheduling:
; CHECK:       str     r3, [sp, #12]
; CHECK:       str     r2, [sp, #8]
; CHECK:       vldr    d16, [sp, #8]
define void @test_byval_usage_scheduling(i32 %n1, i32 %n2, %struct_t* byval %val) nounwind {
entry:
  %a = getelementptr inbounds %struct_t* %val, i32 0, i32 0
  %0 = load double* %a
  %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([12 x i8]* @.str, i32 0, i32 0), double %0)
  ret void
}
Issue description: SchedulerDAGInstrs::buildSchedGraph ignores dependencies between FixedStack objects and byval parameters. So loading byval parameters from stack may be inserted before it will be stored, since these operations are treated as independent. Fix: Currently ARMTargetLowering::LowerFormalArguments saves byval registers with FixedStack MachinePointerInfo. To fix the problem we need to store byval registers with MachinePointerInfo referenced to first the "byval" parameter. Also commit adds two new fields to the InputArg structure: Function's argument index and InputArg's part offset in bytes relative to the start position of Function's argument. E.g.: If function's argument is 128 bit width and it was splitted onto 32 bit regs, then we got 4 InputArg structs with same arg index, but different offset values. llvm-svn: 165616 2012-10-10 13:37:36 +02:00			`; RUN: llc < %s -mtriple=armv7-none-linux-gnueabi \| FileCheck %s`

			`@.str = private unnamed_addr constant [12 x i8] c"val.a = %f\0A\00"`
			`%struct_t = type { double, double, double }`
			`@static_val = constant %struct_t { double 1.0, double 2.0, double 3.0 }`

			`declare i32 @printf(i8*, ...)`

Convert CodeGen//.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( \)\([A-Z0-9_]\):\( \)test\([A-Za-z0-9_-]\):\( \)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen//*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258 2013-07-13 22:38:47 +02:00			`; CHECK-LABEL: test_byval_usage_scheduling:`
Issue description: SchedulerDAGInstrs::buildSchedGraph ignores dependencies between FixedStack objects and byval parameters. So loading byval parameters from stack may be inserted before it will be stored, since these operations are treated as independent. Fix: Currently ARMTargetLowering::LowerFormalArguments saves byval registers with FixedStack MachinePointerInfo. To fix the problem we need to store byval registers with MachinePointerInfo referenced to first the "byval" parameter. Also commit adds two new fields to the InputArg structure: Function's argument index and InputArg's part offset in bytes relative to the start position of Function's argument. E.g.: If function's argument is 128 bit width and it was splitted onto 32 bit regs, then we got 4 InputArg structs with same arg index, but different offset values. llvm-svn: 165616 2012-10-10 13:37:36 +02:00			`; CHECK: str r3, [sp, #12]`
			`; CHECK: str r2, [sp, #8]`
			`; CHECK: vldr d16, [sp, #8]`
			`define void @test_byval_usage_scheduling(i32 %n1, i32 %n2, %struct_t* byval %val) nounwind {`
			`entry:`
			`%a = getelementptr inbounds %struct_t* %val, i32 0, i32 0`
			`%0 = load double* %a`
			`%call = call i32 (i8, ...) @printf(i8* getelementptr inbounds ([12 x i8]* @.str, i32 0, i32 0), double %0)`
			`ret void`
			`}`