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llvm-6502/test/CodeGen/SystemZ/frame-03.ll
Ulrich Weigand cf0fa9b9dd [SystemZ] Add CodeGen support for scalar f64 ops in vector registers 
The z13 vector facility includes some instructions that operate only on the
high f64 in a v2f64, effectively extending the FP register set from 16
to 32 registers.  It's still better to use the old instructions if the
operands happen to fit though, since the older instructions have a shorter
encoding.

Based on a patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236524 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-05 19:28:34 +00:00

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8.8 KiB
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; Like frame-02.ll, but with doubles rather than floats. Internally this
; uses a different register class, but the set of saved and restored
; registers should be the same.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
; This function should require all FPRs, but no other spill slots.
; We need to save and restore 8 of the 16 FPRs, so the frame size
; should be exactly 160 + 8 * 8 = 224. The CFA offset is 160
; (the caller-allocated part of the frame) + 224.
define void @f1(double *%ptr) {
; CHECK-LABEL: f1:
; CHECK: aghi %r15, -224
; CHECK: .cfi_def_cfa_offset 384
; CHECK: std %f8, 216(%r15)
; CHECK: std %f9, 208(%r15)
; CHECK: std %f10, 200(%r15)
; CHECK: std %f11, 192(%r15)
; CHECK: std %f12, 184(%r15)
; CHECK: std %f13, 176(%r15)
; CHECK: std %f14, 168(%r15)
; CHECK: std %f15, 160(%r15)
; CHECK: .cfi_offset %f8, -168
; CHECK: .cfi_offset %f9, -176
; CHECK: .cfi_offset %f10, -184
; CHECK: .cfi_offset %f11, -192
; CHECK: .cfi_offset %f12, -200
; CHECK: .cfi_offset %f13, -208
; CHECK: .cfi_offset %f14, -216
; CHECK: .cfi_offset %f15, -224
; ...main function body...
; CHECK: ld %f8, 216(%r15)
; CHECK: ld %f9, 208(%r15)
; CHECK: ld %f10, 200(%r15)
; CHECK: ld %f11, 192(%r15)
; CHECK: ld %f12, 184(%r15)
; CHECK: ld %f13, 176(%r15)
; CHECK: ld %f14, 168(%r15)
; CHECK: ld %f15, 160(%r15)
; CHECK: aghi %r15, 224
; CHECK: br %r14
%l0 = load volatile double , double *%ptr
%l1 = load volatile double , double *%ptr
%l2 = load volatile double , double *%ptr
%l3 = load volatile double , double *%ptr
%l4 = load volatile double , double *%ptr
%l5 = load volatile double , double *%ptr
%l6 = load volatile double , double *%ptr
%l7 = load volatile double , double *%ptr
%l8 = load volatile double , double *%ptr
%l9 = load volatile double , double *%ptr
%l10 = load volatile double , double *%ptr
%l11 = load volatile double , double *%ptr
%l12 = load volatile double , double *%ptr
%l13 = load volatile double , double *%ptr
%l14 = load volatile double , double *%ptr
%l15 = load volatile double , double *%ptr
%add0 = fadd double %l0, %l0
%add1 = fadd double %l1, %add0
%add2 = fadd double %l2, %add1
%add3 = fadd double %l3, %add2
%add4 = fadd double %l4, %add3
%add5 = fadd double %l5, %add4
%add6 = fadd double %l6, %add5
%add7 = fadd double %l7, %add6
%add8 = fadd double %l8, %add7
%add9 = fadd double %l9, %add8
%add10 = fadd double %l10, %add9
%add11 = fadd double %l11, %add10
%add12 = fadd double %l12, %add11
%add13 = fadd double %l13, %add12
%add14 = fadd double %l14, %add13
%add15 = fadd double %l15, %add14
store volatile double %add0, double *%ptr
store volatile double %add1, double *%ptr
store volatile double %add2, double *%ptr
store volatile double %add3, double *%ptr
store volatile double %add4, double *%ptr
store volatile double %add5, double *%ptr
store volatile double %add6, double *%ptr
store volatile double %add7, double *%ptr
store volatile double %add8, double *%ptr
store volatile double %add9, double *%ptr
store volatile double %add10, double *%ptr
store volatile double %add11, double *%ptr
store volatile double %add12, double *%ptr
store volatile double %add13, double *%ptr
store volatile double %add14, double *%ptr
store volatile double %add15, double *%ptr
ret void
}
; Like f1, but requires one fewer FPR. We allocate in numerical order,
; so %f15 is the one that gets dropped.
define void @f2(double *%ptr) {
; CHECK-LABEL: f2:
; CHECK: aghi %r15, -216
; CHECK: .cfi_def_cfa_offset 376
; CHECK: std %f8, 208(%r15)
; CHECK: std %f9, 200(%r15)
; CHECK: std %f10, 192(%r15)
; CHECK: std %f11, 184(%r15)
; CHECK: std %f12, 176(%r15)
; CHECK: std %f13, 168(%r15)
; CHECK: std %f14, 160(%r15)
; CHECK: .cfi_offset %f8, -168
; CHECK: .cfi_offset %f9, -176
; CHECK: .cfi_offset %f10, -184
; CHECK: .cfi_offset %f11, -192
; CHECK: .cfi_offset %f12, -200
; CHECK: .cfi_offset %f13, -208
; CHECK: .cfi_offset %f14, -216
; CHECK-NOT: %f15
; ...main function body...
; CHECK: ld %f8, 208(%r15)
; CHECK: ld %f9, 200(%r15)
; CHECK: ld %f10, 192(%r15)
; CHECK: ld %f11, 184(%r15)
; CHECK: ld %f12, 176(%r15)
; CHECK: ld %f13, 168(%r15)
; CHECK: ld %f14, 160(%r15)
; CHECK: aghi %r15, 216
; CHECK: br %r14
%l0 = load volatile double , double *%ptr
%l1 = load volatile double , double *%ptr
%l2 = load volatile double , double *%ptr
%l3 = load volatile double , double *%ptr
%l4 = load volatile double , double *%ptr
%l5 = load volatile double , double *%ptr
%l6 = load volatile double , double *%ptr
%l7 = load volatile double , double *%ptr
%l8 = load volatile double , double *%ptr
%l9 = load volatile double , double *%ptr
%l10 = load volatile double , double *%ptr
%l11 = load volatile double , double *%ptr
%l12 = load volatile double , double *%ptr
%l13 = load volatile double , double *%ptr
%l14 = load volatile double , double *%ptr
%add0 = fadd double %l0, %l0
%add1 = fadd double %l1, %add0
%add2 = fadd double %l2, %add1
%add3 = fadd double %l3, %add2
%add4 = fadd double %l4, %add3
%add5 = fadd double %l5, %add4
%add6 = fadd double %l6, %add5
%add7 = fadd double %l7, %add6
%add8 = fadd double %l8, %add7
%add9 = fadd double %l9, %add8
%add10 = fadd double %l10, %add9
%add11 = fadd double %l11, %add10
%add12 = fadd double %l12, %add11
%add13 = fadd double %l13, %add12
%add14 = fadd double %l14, %add13
store volatile double %add0, double *%ptr
store volatile double %add1, double *%ptr
store volatile double %add2, double *%ptr
store volatile double %add3, double *%ptr
store volatile double %add4, double *%ptr
store volatile double %add5, double *%ptr
store volatile double %add6, double *%ptr
store volatile double %add7, double *%ptr
store volatile double %add8, double *%ptr
store volatile double %add9, double *%ptr
store volatile double %add10, double *%ptr
store volatile double %add11, double *%ptr
store volatile double %add12, double *%ptr
store volatile double %add13, double *%ptr
store volatile double %add14, double *%ptr
ret void
}
; Like f1, but should require only one call-saved FPR.
define void @f3(double *%ptr) {
; CHECK-LABEL: f3:
; CHECK: aghi %r15, -168
; CHECK: .cfi_def_cfa_offset 328
; CHECK: std %f8, 160(%r15)
; CHECK: .cfi_offset %f8, -168
; CHECK-NOT: %f9
; CHECK-NOT: %f10
; CHECK-NOT: %f11
; CHECK-NOT: %f12
; CHECK-NOT: %f13
; CHECK-NOT: %f14
; CHECK-NOT: %f15
; ...main function body...
; CHECK: ld %f8, 160(%r15)
; CHECK: aghi %r15, 168
; CHECK: br %r14
%l0 = load volatile double , double *%ptr
%l1 = load volatile double , double *%ptr
%l2 = load volatile double , double *%ptr
%l3 = load volatile double , double *%ptr
%l4 = load volatile double , double *%ptr
%l5 = load volatile double , double *%ptr
%l6 = load volatile double , double *%ptr
%l7 = load volatile double , double *%ptr
%l8 = load volatile double , double *%ptr
%add0 = fadd double %l0, %l0
%add1 = fadd double %l1, %add0
%add2 = fadd double %l2, %add1
%add3 = fadd double %l3, %add2
%add4 = fadd double %l4, %add3
%add5 = fadd double %l5, %add4
%add6 = fadd double %l6, %add5
%add7 = fadd double %l7, %add6
%add8 = fadd double %l8, %add7
store volatile double %add0, double *%ptr
store volatile double %add1, double *%ptr
store volatile double %add2, double *%ptr
store volatile double %add3, double *%ptr
store volatile double %add4, double *%ptr
store volatile double %add5, double *%ptr
store volatile double %add6, double *%ptr
store volatile double %add7, double *%ptr
store volatile double %add8, double *%ptr
ret void
}
; This function should use all call-clobbered FPRs but no call-saved ones.
; It shouldn't need to create a frame.
define void @f4(double *%ptr) {
; CHECK-LABEL: f4:
; CHECK-NOT: %r15
; CHECK-NOT: %f8
; CHECK-NOT: %f9
; CHECK-NOT: %f10
; CHECK-NOT: %f11
; CHECK-NOT: %f12
; CHECK-NOT: %f13
; CHECK-NOT: %f14
; CHECK-NOT: %f15
; CHECK: br %r14
%l0 = load volatile double , double *%ptr
%l1 = load volatile double , double *%ptr
%l2 = load volatile double , double *%ptr
%l3 = load volatile double , double *%ptr
%l4 = load volatile double , double *%ptr
%l5 = load volatile double , double *%ptr
%l6 = load volatile double , double *%ptr
%l7 = load volatile double , double *%ptr
%add0 = fadd double %l0, %l0
%add1 = fadd double %l1, %add0
%add2 = fadd double %l2, %add1
%add3 = fadd double %l3, %add2
%add4 = fadd double %l4, %add3
%add5 = fadd double %l5, %add4
%add6 = fadd double %l6, %add5
%add7 = fadd double %l7, %add6
store volatile double %add0, double *%ptr
store volatile double %add1, double *%ptr
store volatile double %add2, double *%ptr
store volatile double %add3, double *%ptr
store volatile double %add4, double *%ptr
store volatile double %add5, double *%ptr
store volatile double %add6, double *%ptr
store volatile double %add7, double *%ptr
ret void
}
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