[Hexagon] Generate post-increment for floating point types

The code that generates post-increments for Hexagon considered
integer values only. This patch adds support to generate them for
floating point values, f32 and f64.

Differential Revision: https://reviews.llvm.org/D47036

llvm-svn: 332748

2 files changed, 87 insertions, 2 deletions

diff --git a/llvm/test/CodeGen/Hexagon/postinc-float.ll b/llvm/test/CodeGen/Hexagon/postinc-float.ll
new file mode 100644
index 00000000000..55bf82ddff5
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/postinc-float.ll
@@ -0,0 +1,86 @@
+; RUN: llc -mtriple=hexagon-unknown-elf < %s | FileCheck %s
+
+; CHECK-LABEL: ldf
+; CHECK: memw(r{{[0-9]+}}++#4)
+; CHECK: memw(r{{[0-9]+}}++#4)
+define float @ldf(float* nocapture readonly %x, float* nocapture readonly %y) local_unnamed_addr #0 {
+entry:
+  br label %for.body
+
+for.body:
+  %arrayidx.phi = phi float* [ %x, %entry ], [ %arrayidx.inc, %for.body ]
+  %arrayidx1.phi = phi float* [ %y, %entry ], [ %arrayidx1.inc, %for.body ]
+  %i.09 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+  %acc.08 = phi float [ 0.000000e+00, %entry ], [ %add, %for.body ]
+  %0 = load float, float* %arrayidx.phi, align 4
+  %1 = load float, float* %arrayidx1.phi, align 4
+  %mul = fmul contract float %0, %1
+  %add = fadd contract float %acc.08, %mul
+  %inc = add nuw nsw i32 %i.09, 1
+  %exitcond = icmp eq i32 %inc, 1024
+  %arrayidx.inc = getelementptr float, float* %arrayidx.phi, i32 1
+  %arrayidx1.inc = getelementptr float, float* %arrayidx1.phi, i32 1
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret float %add
+}
+
+; CHECK-LABEL: ldd
+; CHECK: memd(r{{[0-9]+}}++#8)
+; CHECK: memd(r{{[0-9]+}}++#8)
+define double @ldd(double* nocapture readonly %x, double* nocapture readonly %y) local_unnamed_addr #0 {
+entry:
+  br label %for.body
+
+for.body:
+  %arrayidx.phi = phi double* [ %x, %entry ], [ %arrayidx.inc, %for.body ]
+  %arrayidx1.phi = phi double* [ %y, %entry ], [ %arrayidx1.inc, %for.body ]
+  %i.09 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+  %acc.08 = phi double [ 0.000000e+00, %entry ], [ %add, %for.body ]
+  %0 = load double, double* %arrayidx.phi, align 8
+  %1 = load double, double* %arrayidx1.phi, align 8
+  %mul = fmul contract double %0, %1
+  %add = fadd contract double %acc.08, %mul
+  %inc = add nuw nsw i32 %i.09, 1
+  %exitcond = icmp eq i32 %inc, 1024
+  %arrayidx.inc = getelementptr double, double* %arrayidx.phi, i32 1
+  %arrayidx1.inc = getelementptr double, double* %arrayidx1.phi, i32 1
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret double %add
+}
+
+; CHECK-LABEL: stf
+; CHECK: memw(r{{[0-9]+}}++#4)
+define double* @stf(float* returned %p) local_unnamed_addr #0 {
+entry:
+  br label %for.body
+
+for.body:
+  %arrayidx.phi = phi float* [ %arrayidx.inc, %for.body ], [ %p, %entry ]
+  %call = tail call float @foof() #2
+  store float %call, float* %arrayidx.phi, align 8
+  %arrayidx.inc = getelementptr float, float* %arrayidx.phi, i32 1
+  br label %for.body
+}
+
+declare float @foof() local_unnamed_addr #1
+
+; CHECK-LABEL: std
+; CHECK: memd(r{{[0-9]+}}++#8)
+define double* @std(double* returned %p) local_unnamed_addr #0 {
+entry:
+  br label %for.body
+
+for.body:
+  %arrayidx.phi = phi double* [ %arrayidx.inc, %for.body ], [ %p, %entry ]
+  %call = tail call double @food() #2
+  store double %call, double* %arrayidx.phi, align 8
+  %arrayidx.inc = getelementptr double, double* %arrayidx.phi, i32 1
+  br label %for.body
+}
+
+declare double @food() local_unnamed_addr #1
+
diff --git a/llvm/test/CodeGen/Hexagon/swp-memrefs-epilog.ll b/llvm/test/CodeGen/Hexagon/swp-memrefs-epilog.ll
index ee017114e5a..81f4d22cfd5 100644
--- a/llvm/test/CodeGen/Hexagon/swp-memrefs-epilog.ll
+++ b/llvm/test/CodeGen/Hexagon/swp-memrefs-epilog.ll
@@ -10,8 +10,7 @@
 ; to r29+32. If the memoperands are updated incorrectly, these are swapped.
 
 ; CHECK: [[REG0:r([0-9]+)]] = add(r29,#24)
-; CHECK: [[REG1:r([0-9]+)]] = add([[REG0]],#4)
-; CHECK: memw([[REG1]]+#{{[0-9]}}) = r{{[0-9]+}}
+; CHECK: memw([[REG0]]++#4) = r{{[0-9]+}}
 ; CHECK: r{{[0-9]+}} = memw(r29+#{{[0-9]+}})
 
 %s.0 = type { %s.1 }