[SystemZ] Immediate compare-and-branch support

This patch adds support for the CIJ and CGIJ instructions.

llvm-svn: 182846

1 files changed, 67 insertions, 24 deletions

diff --git a/llvm/test/CodeGen/SystemZ/int-cmp-09.ll b/llvm/test/CodeGen/SystemZ/int-cmp-09.ll
index 06ebee250bc..8fb0e7c41a4 100644
--- a/llvm/test/CodeGen/SystemZ/int-cmp-09.ll
+++ b/llvm/test/CodeGen/SystemZ/int-cmp-09.ll
@@ -5,8 +5,7 @@
 ; Check comparisons with 0.
 define double @f1(double %a, double %b, i32 %i1) {
 ; CHECK: f1:
-; CHECK: chi %r2, 0
-; CHECK-NEXT: jl
+; CHECK: cijl %r2, 0
 ; CHECK: ldr %f0, %f2
 ; CHECK: br %r14
   %cond = icmp slt i32 %i1, 0
@@ -17,8 +16,7 @@ define double @f1(double %a, double %b, i32 %i1) {
 ; Check comparisons with 1.
 define double @f2(double %a, double %b, i32 %i1) {
 ; CHECK: f2:
-; CHECK: chi %r2, 1
-; CHECK-NEXT: jl
+; CHECK: cijl %r2, 1
 ; CHECK: ldr %f0, %f2
 ; CHECK: br %r14
   %cond = icmp slt i32 %i1, 1
@@ -26,9 +24,32 @@ define double @f2(double %a, double %b, i32 %i1) {
   ret double %res
 }
 
-; Check the high end of the CHI range.
+; Check the high end of the CIJ range.
 define double @f3(double %a, double %b, i32 %i1) {
 ; CHECK: f3:
+; CHECK: cijl %r2, 127
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, 127
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value up, which must use CHI instead.
+define double @f4(double %a, double %b, i32 %i1) {
+; CHECK: f4:
+; CHECK: chi %r2, 128
+; CHECK-NEXT: jl
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, 128
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the high end of the CHI range.
+define double @f5(double %a, double %b, i32 %i1) {
+; CHECK: f5:
 ; CHECK: chi %r2, 32767
 ; CHECK-NEXT: jl
 ; CHECK: ldr %f0, %f2
@@ -39,8 +60,8 @@ define double @f3(double %a, double %b, i32 %i1) {
 }
 
 ; Check the next value up, which must use CFI.
-define double @f4(double %a, double %b, i32 %i1) {
-; CHECK: f4:
+define double @f6(double %a, double %b, i32 %i1) {
+; CHECK: f6:
 ; CHECK: cfi %r2, 32768
 ; CHECK-NEXT: jl
 ; CHECK: ldr %f0, %f2
@@ -51,8 +72,8 @@ define double @f4(double %a, double %b, i32 %i1) {
 }
 
 ; Check the high end of the signed 32-bit range.
-define double @f5(double %a, double %b, i32 %i1) {
-; CHECK: f5:
+define double @f7(double %a, double %b, i32 %i1) {
+; CHECK: f7:
 ; CHECK: cfi %r2, 2147483647
 ; CHECK-NEXT: je
 ; CHECK: ldr %f0, %f2
@@ -63,8 +84,8 @@ define double @f5(double %a, double %b, i32 %i1) {
 }
 
 ; Check the next value up, which should be treated as a negative value.
-define double @f6(double %a, double %b, i32 %i1) {
-; CHECK: f6:
+define double @f8(double %a, double %b, i32 %i1) {
+; CHECK: f8:
 ; CHECK: cfi %r2, -2147483648
 ; CHECK-NEXT: je
 ; CHECK: ldr %f0, %f2
@@ -74,11 +95,10 @@ define double @f6(double %a, double %b, i32 %i1) {
   ret double %res
 }
 
-; Check the high end of the negative CHI range.
-define double @f7(double %a, double %b, i32 %i1) {
-; CHECK: f7:
-; CHECK: chi %r2, -1
-; CHECK-NEXT: jl
+; Check the high end of the negative CIJ range.
+define double @f9(double %a, double %b, i32 %i1) {
+; CHECK: f9:
+; CHECK: cijl %r2, -1
 ; CHECK: ldr %f0, %f2
 ; CHECK: br %r14
   %cond = icmp slt i32 %i1, -1
@@ -86,9 +106,32 @@ define double @f7(double %a, double %b, i32 %i1) {
   ret double %res
 }
 
+; Check the low end of the CIJ range.
+define double @f10(double %a, double %b, i32 %i1) {
+; CHECK: f10:
+; CHECK: cijl %r2, -128
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, -128
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
+; Check the next value down, which must use CHI instead.
+define double @f11(double %a, double %b, i32 %i1) {
+; CHECK: f11:
+; CHECK: chi %r2, -129
+; CHECK-NEXT: jl
+; CHECK: ldr %f0, %f2
+; CHECK: br %r14
+  %cond = icmp slt i32 %i1, -129
+  %res = select i1 %cond, double %a, double %b
+  ret double %res
+}
+
 ; Check the low end of the CHI range.
-define double @f8(double %a, double %b, i32 %i1) {
-; CHECK: f8:
+define double @f12(double %a, double %b, i32 %i1) {
+; CHECK: f12:
 ; CHECK: chi %r2, -32768
 ; CHECK-NEXT: jl
 ; CHECK: ldr %f0, %f2
@@ -99,8 +142,8 @@ define double @f8(double %a, double %b, i32 %i1) {
 }
 
 ; Check the next value down, which must use CFI instead.
-define double @f9(double %a, double %b, i32 %i1) {
-; CHECK: f9:
+define double @f13(double %a, double %b, i32 %i1) {
+; CHECK: f13:
 ; CHECK: cfi %r2, -32769
 ; CHECK-NEXT: jl
 ; CHECK: ldr %f0, %f2
@@ -111,8 +154,8 @@ define double @f9(double %a, double %b, i32 %i1) {
 }
 
 ; Check the low end of the signed 32-bit range.
-define double @f10(double %a, double %b, i32 %i1) {
-; CHECK: f10:
+define double @f14(double %a, double %b, i32 %i1) {
+; CHECK: f14:
 ; CHECK: cfi %r2, -2147483648
 ; CHECK-NEXT: je
 ; CHECK: ldr %f0, %f2
@@ -123,8 +166,8 @@ define double @f10(double %a, double %b, i32 %i1) {
 }
 
 ; Check the next value down, which should be treated as a positive value.
-define double @f11(double %a, double %b, i32 %i1) {
-; CHECK: f11:
+define double @f15(double %a, double %b, i32 %i1) {
+; CHECK: f15:
 ; CHECK: cfi %r2, 2147483647
 ; CHECK-NEXT: je
 ; CHECK: ldr %f0, %f2