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46abfcf418
Now even the small structures could be passed within byval (small enough
to be stored in GPRs).
In regression tests next function prototypes are checked:
PR15293:
%artz = type { i32 }
define void @foo(%artz* byval %s)
define void @foo2(%artz* byval %s, i32 %p, %artz* byval %s2)
foo: "s" stored in R0
foo2: "s" stored in R0, "s2" stored in R2.
Next AAPCS rules are checked:
5.5 Parameters Passing, C.4 and C.5,
"ParamSize" is parameter size in 32bit words:
-- NSAA != 0, NCRN < R4 and NCRN+ParamSize > R4.
Parameter should be sent to the stack; NCRN := R4.
-- NSAA != 0, and NCRN < R4, NCRN+ParamSize < R4.
Parameter stored in GPRs; NCRN += ParamSize.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181148 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.5 KiB
LLVM
49 lines
1.5 KiB
LLVM
;Check AAPCS, 5.5 Parameters Passing, C4 and C5 rules.
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;Check case when NSAA != 0, and NCRN < R4, NCRN+ParamSize < R4
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;RUN: llc -mtriple=thumbv7-linux-gnueabihf -float-abi=hard < %s | FileCheck %s
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%st_t = type { i32, i32 }
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@static_val = constant %st_t { i32 777, i32 888}
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declare void @fooUseStruct(%st_t*)
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define void @foo(double %vfp0, ; --> D0, NSAA=SP
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double %vfp1, ; --> D1, NSAA=SP
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double %vfp2, ; --> D2, NSAA=SP
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double %vfp3, ; --> D3, NSAA=SP
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double %vfp4, ; --> D4, NSAA=SP
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double %vfp5, ; --> D5, NSAA=SP
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double %vfp6, ; --> D6, NSAA=SP
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double %vfp7, ; --> D7, NSAA=SP
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double %vfp8, ; --> SP, NSAA=SP+8 (!)
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i32 %p0, ; --> R0, NSAA=SP+8
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%st_t* byval %p1, ; --> R1, R2, NSAA=SP+8
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i32 %p2, ; --> R3, NSAA=SP+8
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i32 %p3) #0 { ; --> SP+4, NSAA=SP+12
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entry:
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;CHECK: sub sp, #8
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;CHECK: push.w {r11, lr}
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;CHECK: add r0, sp, #16
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;CHECK: str r2, [sp, #20]
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;CHECK: str r1, [sp, #16]
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;CHECK: bl fooUseStruct
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call void @fooUseStruct(%st_t* %p1)
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ret void
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}
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define void @doFoo() {
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entry:
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call void @foo(double 23.0,
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double 23.1,
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double 23.2,
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double 23.3,
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double 23.4,
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double 23.5,
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double 23.6,
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double 23.7,
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double 23.8,
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i32 0, %st_t* byval @static_val, i32 1, i32 2)
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ret void
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}
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