[PowerPC] Call support for fast-isel.

This patch adds fast-isel support for calls (but not intrinsic calls
or varargs calls).  It also removes a badly-formed assert.  There are
some new tests just for calls, and also for folding loads into
arguments on calls to avoid extra extends.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189701 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 166 insertions, 0 deletions

diff --git a/test/CodeGen/PowerPC/fast-isel-call.ll b/test/CodeGen/PowerPC/fast-isel-call.ll
new file mode 100644
index 0000000000..33a8ba903e
--- /dev/null
+++ b/test/CodeGen/PowerPC/fast-isel-call.ll
@@ -0,0 +1,132 @@
+; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck %s --check-prefix=ELF64
+
+define i32 @t1(i8 signext %a) nounwind {
+  %1 = sext i8 %a to i32
+  ret i32 %1
+}
+
+define i32 @t2(i8 zeroext %a) nounwind {
+  %1 = zext i8 %a to i32
+  ret i32 %1
+}
+
+define i32 @t3(i16 signext %a) nounwind {
+  %1 = sext i16 %a to i32
+  ret i32 %1
+}
+
+define i32 @t4(i16 zeroext %a) nounwind {
+  %1 = zext i16 %a to i32
+  ret i32 %1
+}
+
+define void @foo(i8 %a, i16 %b) nounwind {
+; ELF64: foo
+  %1 = call i32 @t1(i8 signext %a)
+; ELF64: extsb
+  %2 = call i32 @t2(i8 zeroext %a)
+; ELF64: rldicl {{[0-9]+}}, {{[0-9]+}}, 0, 56
+  %3 = call i32 @t3(i16 signext %b)
+; ELF64: extsh
+  %4 = call i32 @t4(i16 zeroext %b)
+; ELF64: rldicl {{[0-9]+}}, {{[0-9]+}}, 0, 48
+
+;; A few test to check materialization
+  %5 = call i32 @t2(i8 zeroext 255)
+; ELF64: rldicl {{[0-9]+}}, {{[0-9]+}}, 0, 56
+  %6 = call i32 @t4(i16 zeroext 65535)
+; ELF64: rldicl {{[0-9]+}}, {{[0-9]+}}, 0, 48
+  ret void
+}
+
+define void @foo2() nounwind {
+  %1 = call signext i16 @t5()
+  %2 = call zeroext i16 @t6()
+  %3 = call signext i8 @t7()
+  %4 = call zeroext i8 @t8()
+  ret void
+}
+
+declare signext i16 @t5();
+declare zeroext i16 @t6();
+declare signext i8 @t7();
+declare zeroext i8 @t8();
+
+define i32 @t10(i32 %argc, i8** nocapture %argv) {
+entry:
+; ELF64: t10
+  %call = call i32 @bar(i8 zeroext 0, i8 zeroext -8, i8 zeroext -69, i8 zeroext 28, i8 zeroext 40, i8 zeroext -70)
+; ELF64: li 3, 0
+; ELF64: li 4, 248
+; ELF64: li 5, 187
+; ELF64: li 6, 28
+; ELF64: li 7, 40
+; ELF64: li 8, 186
+; ELF64: rldicl 3, 3, 0, 56
+; ELF64: rldicl 4, 4, 0, 56
+; ELF64: rldicl 5, 5, 0, 56
+; ELF64: rldicl 6, 6, 0, 56
+; ELF64: rldicl 7, 7, 0, 56
+; ELF64: rldicl 8, 8, 0, 56
+  ret i32 0
+}
+
+declare i32 @bar(i8 zeroext, i8 zeroext, i8 zeroext, i8 zeroext, i8 zeroext, i8 zeroext)
+
+define i32 @bar0(i32 %i) nounwind {
+  ret i32 0
+}
+
+; Function pointers are not yet implemented.
+;define void @foo3() uwtable {
+;  %fptr = alloca i32 (i32)*, align 8
+;  store i32 (i32)* @bar0, i32 (i32)** %fptr, align 8
+;  %1 = load i32 (i32)** %fptr, align 8
+;  %call = call i32 %1(i32 0)
+;  ret void
+;}
+
+; Intrinsic calls not yet implemented, and udiv isn't one for PPC anyway.
+;define i32 @LibCall(i32 %a, i32 %b) {
+;entry:
+;        %tmp1 = udiv i32 %a, %b         ; <i32> [#uses=1]
+;        ret i32 %tmp1
+;}
+
+declare void @float_foo(float %f) ssp
+
+define void @float_const() ssp {
+entry:
+; ELF64: float_const
+  call void @float_foo(float 0x401C666660000000)
+; ELF64: addis [[REG:[0-9]+]], 2, .LCPI[[SUF:[0-9_]+]]@toc@ha
+; ELF64: lfs 1, .LCPI[[SUF]]@toc@l([[REG]])
+  ret void
+}
+
+define void @float_reg(float %dummy, float %f) ssp {
+entry:
+; ELF64: float_reg
+  call void @float_foo(float %f)
+; ELF64: fmr 1, 2
+  ret void
+}
+
+declare void @double_foo(double %d) ssp
+
+define void @double_const() ssp {
+entry:
+; ELF64: double_const
+  call void @double_foo(double 0x1397723CCABD0000401C666660000000)
+; ELF64: addis [[REG2:[0-9]+]], 2, .LCPI[[SUF2:[0-9_]+]]@toc@ha
+; ELF64: lfd 1, .LCPI[[SUF2]]@toc@l([[REG2]])
+  ret void
+}
+
+define void @double_reg(double %dummy, double %d) ssp {
+entry:
+; ELF64: double_reg
+  call void @double_foo(double %d)
+; ELF64: fmr 1, 2
+  ret void
+}
diff --git a/test/CodeGen/PowerPC/fast-isel-fold.ll b/test/CodeGen/PowerPC/fast-isel-fold.ll
index 21e691224d..4de345f309 100644
--- a/test/CodeGen/PowerPC/fast-isel-fold.ll
+++ b/test/CodeGen/PowerPC/fast-isel-fold.ll
@@ -4,6 +4,40 @@
 @b = global i16 2, align 2
 @c = global i32 4, align 4
 
+define void @t1() nounwind uwtable ssp {
+; ELF64: t1
+  %1 = load i8* @a, align 1
+  call void @foo1(i8 zeroext %1)
+; ELF64: lbz
+; ELF64-NOT: rldicl
+; ELF64-NOT: rlwinm
+  ret void
+}
+
+define void @t2() nounwind uwtable ssp {
+; ELF64: t2
+  %1 = load i16* @b, align 2
+  call void @foo2(i16 zeroext %1)
+; ELF64: lhz
+; ELF64-NOT: rldicl
+; ELF64-NOT: rlwinm
+  ret void
+}
+
+define void @t2a() nounwind uwtable ssp {
+; ELF64: t2a
+  %1 = load i32* @c, align 4
+  call void @foo3(i32 zeroext %1)
+; ELF64: lwz
+; ELF64-NOT: rldicl
+; ELF64-NOT: rlwinm
+  ret void
+}
+
+declare void @foo1(i8 zeroext)
+declare void @foo2(i16 zeroext)
+declare void @foo3(i32 zeroext)
+
 define i32 @t3() nounwind uwtable ssp {
 ; ELF64: t3
   %1 = load i8* @a, align 1