doc nits

1 files changed, 5 insertions, 5 deletions

diff --git a/doc/il.txt b/doc/il.txt
index 51525d7..865b81f 100644
--- a/doc/il.txt
+++ b/doc/il.txt
@@ -761,7 +761,7 @@ will be correctly compiled by QBE.
     @end
             ret %s
 
-Now, if you want to know what a phi instruction is and how
+Now, if you want to know what phi instructions are and how
 to use them in QBE, you can read the following.
 
 Phi instructions are specific to SSA form.  In SSA form
@@ -791,10 +791,10 @@ translate it in SSA form is to insert a phi instruction.
             %y =w phi @ift 1, @iff 2
             ret %y
 
-The phi in the example expresses a choice depending on
-which block the control came from.  When the `@ift` block
-is taken, the phi instruction defining `%y` selects 1;
-if `@iff` is taken, 2 is selected.
+Phi instructions return one of their arguments depending
+on where the control came from.  In the example, `%y` is
+set to 1 if the `@ift` branch is taken, and it is set to
+2 otherwise.
 
 An important remark about phi instructions is that QBE
 assumes that if a variable is defined by a phi it respects